Six Flags Discovery Kingdom
||This article needs additional citations for verification. (December 2008)|
|Location||Vallejo, California, United States|
|Previous names||Marine World, Marine World Africa USA, The New Marine World Theme Park, Six Flags Marine World|
|Operating season||Early March through early January (2010 season)|
|Area||135 acres (55 ha)|
Six Flags Discovery Kingdom (formerly known as Six Flags Marine World, Marine World, The New Marine World Theme Park, and Marine World Africa USA) is a 135 acres (55 ha) animal theme park located in Vallejo, California. The park includes a variety of roller coasters and other amusement rides, along with a collection of animal exhibits and shows. It has been part of the Six Flags chain of amusement parks since 1999.
Early history 
The park first opened in 1968 as Marine World, a small oceanarium in Redwood City, California. In the mid-1970s, they merged with a failing land-animal park called 'Africa, USA', and became Marine World Africa USA.
In late-1985, the increase in the value of the property the park occupied became too great a tax burden. Following an intensive search for a new site, construction began on a new and larger park facility in Vallejo, California (about 55 miles (89 km) north from Redwood City). The new Marine World opened to visitors in 1986, and remained under control of the non-profit Marine World Foundation, using Garfield as a mascot at various points. The park defaulted on its debt to the City of Vallejo, and thus became owned by the city, in 1996.
Conversion to a theme park 
The city then hired Premier Parks (now known as Six Flags Inc.) to manage the park, upgrade it, and improve its attendance. Premier added some non-animal attractions, particularly amusement rides, to increase attendance. In 1997, the park added two major ride attractions, "Popeye's Seaport" and "DinoSphere". Popeye's Seaport offered eleven children's attractions, including an interactive foam ball play structure and an interactive water play area. DinoSphere took the place of the park's Australian Walk-A-Bout attraction (also the former home of the "DINOSAURS!" attraction). DinoSphere was an Iwerks Turbo Theater, capable of seating 100 riders per showing. The theater played the Iwerks film called "Dino Island" for its first season of operation (the theater has since changed films numerous times).
The number of amusement rides increased over the next few years, including the addition of several major roller coasters. In 1998, the park's name changed again, this time to The New Marine World Theme Park. The 1998 season saw the addition of two major roller coasters, Kong and Boomerang: Coast to Coaster. Kong was relocated from Opryland USA after that park shut down in 1997 and opened at the Marine World in May 1998. Other major additions that year included Hammerhead Shark, a Zamperla Prototype Hawk 48; VooDoo, A HUSS Top Spin; Monsoon Falls and White Water Safari, Intamin water attractions. DinoSphere also received a new ride film, "Dino Island II: Escape from Dino Island" which featured improved graphics along with a new storyline.
Addition to the Six Flags chain 
After more additions of amusement rides, Premier made a name change to Six Flags Marine World in 1999. The most notable result of the name change was the rights to Warner Bros.' Looney Tunes characters. With the new name, the park received the wooden roller coaster called Roar. Built by Great Coasters International Inc., it was the first coaster to feature Millennium Flyer trains. The 1999 season also saw the introduction of Tasmanian Devil, a Frisbee flat ride manufactured by HUSS, and Scat-A-Bout, a typical Scrambler flat ride. Although both rides opened in 1999, they were purchased by the park in 1998 but not constructed until 1999 because of construction timetables that prevented them being constructed in time for the 1998 season opening. Popeye's Seaport was rebranded "Looney Tunes Seaport" and received the Roadrunner Express kiddie coaster.
In 2000, the park opened its fourth major roller coaster dubbed Medusa. Medusa was designed by Bolliger & Mabillard. Medusa lasts three minutes. Starting with a 150-foot-tall (46 m) drop, it then goes through a 128-foot-tall (39 m) vertical loop, a dive loop, a Zero-G roll, a sea serpent roll, and two corkscrews. Medusa is one of the park's most popular rides. With the addition of Medusa, the park also received the Cobra family coaster and built a new parking lot south of the park.
The park received its fifth major roller coaster in 2001, V2: Vertical Velocity. Built by Intamin, the ride was the first "Spiraling Impulse Coaster" on the west coast and took the record for being the tallest and fastest coaster in Northern California. The ride was plagued with technical issues when it opened, which resulted in extensive down time. The park also eventually turned off the LIM motor on the back tower that held the train in position for a few seconds on its second trip up the tower.[verification needed] The park also added the "Warrior of the Dawn" film to its DinoSphere theater.
2002 saw a notable modification to Vertical Velocity. Because of local building restrictions, the height limit on all roller coasters at the park is 150 feet (46 m), while V2 exceeded that limit by about 36 feet (11 m). Thus, they lowered the reverse tower 36 feet (11 m) and turned the forward tower into a 45° angle with an incline heartlineroll that spiraled over the park's main entrance. So far, Vertical Velocity is the only Impulse Coaster to do this. The park turned the LIM motor on the reverse tower back on in 2002 season; however the motor failed to hold the train completely in place and slipped significantly. The motor was eventually turned off again in the 2003 season.[original research?] Also the park began to show "7th Portal", a 3-D comic book film by Stan Lee, in its DinoSphere Theater.
The park added its sixth major roller coaster, Zonga, in 2003. The ride designed by Schwarzkopf, was relocated from Six Flags Astroworld, and received major track modification by Premiere Rides before it opened at Marine World. Zonga opened in late April to a sporadic operation. The ride was often closed because of mechanical problems, and when it did operate, it often closed for short periods of time due to ride errors. Eventually the park delayed its opening to 12 noon every day, completely blocking the ride plaza to park guests. Zonga's last season of operation was 2004, it then sat dormant until it was removed in 2006 and placed in the parking lot for storage. By the beginning of the 2007 season, Zonga was removed from the parking lot. It is now operating at the San Marcos National Fair in Mexico.
The park also began showing "Stargate SG3000" in its IWerks 3D Turbo Theater which finally received new branding and was no longer called "DinoSphere". Stargate, however, did not feature the 3D effect and rarely received good reviews from guests.[original research?]
2006 saw the addition of Tava's Jungleland, a children's area located in the back of the park near the main land animal attractions, featuring nine new attractions for families and small children to enjoy.
Rebranding to Discovery Kingdom 
On January 17, 2007, the park announced its new name, "Six Flags Discovery Kingdom." The new name reflects the image of an animal park, a thrill-ride park, and a marine park. The park was separated into different themed lands of Land (exotic land animals), Sea (marine mammals and the aquarium) and Sky (roller coasters). US$16 million was spent on park improvements, including new signage, new shows, and converting the 3D theater into a "4D" theater. The park also added a Thomas the Tank Engine-themed children's area called Thomas Town, which opened June 20, 2007.
The animal aspects of the park have not vanished under this onslaught of steel and lights, and the park continually adds animal attractions every year. Discovery Kingdom continues to showcase its marine mammals and is currently home to the orca Shouka, who was at the Six Flags park in Ohio until 2004. In 2005, the park added "Ocean Discovery", a major interactive marine animal area that lets guest interact and pet sting rays and Atlantic bottlenose dolphins as well as getting up close to South African penguins.
Most of the animals on display at Six Flags Discovery Kingdom were not born in the wild, but were raised at zoos and aquariums around the country. The park also cares for recovered or rescued animals that cannot be returned to the wild due to injury. Examples include an Atlantic bottlenose dolphin recovered from the Gulf of Mexico in 2003 and a California sea lion that was shot by a fisherman after it tried to steal his catch.
On June 5, 2007, Six Flags confirmed media reports that Six Flags will exercise their option to buy the park.
For 2008, the park featured its longest operating season since it was branded as a Six Flags park. The park has shut down the IWerks 3D Turbo Theater due to escalating repair costs on the out of date operating system and hardware. The park received its 8th roller coaster named Tony Hawk's Big Spin, which is located on the former Zonga concrete pad. The ride features a unique layout compared to the three other coasters which share the name, including a base frame instead of permanent concrete footers and a higher top speed. Tony Hawk's Big Spin opened on May 23, 2008.
In 2009, the park introduced the all new Odin's Temple of the Tiger. The new tiger exhibit and show features the diving, white tiger named Odin. Discovery Kingdom also acquired two new Bengal tiger cubs, Nalin and Akasha.
2009 also saw the addition of the park's official page on Facebook. Fans of the park can stay up to date with all the latest news, updates, and photos from Discovery Kingdom.
In late 2010, Six Flags began the process of removing licensed theming from attractions. They terminated several licenses including their license with Thomas the Tank Engine and Tony Hawk. Tony Hawk's Big Spin was renamed and rethemed to Big Spin, then Pandemonium. Thomas Town will be renamed and rethemed to Seaside Junction in time for the 2011 season.
For the 2011 season, the park introduced the SkyScreamer. The new swing ride is 150 feet (46 m) high and soars in a 98-foot (30 m) circle at speeds over 43 miles per hour (69 km/h). The ride opened on May 27. A few days before July 25, 2011, SkyScreamer at Six Flags St. Louis experienced a major malfunction that has caused it to be closed for the rest of the 2011 season. According to more than one report, something caused the counterweight to suddenly drop to the bottom of the tower, while launching the empty rider carriage to the top, causing damage on both ends. Discovery Kingdom's version was closed as a precaution to allow for further inspection. Discovery Kingdom's SkyScreamer was reopened as of August 12, 2011.
In 2012, the park adds a steel Premier Rides roller coaster called Superman: Ultimate Flight. It is the tallest inversion roller coaster west of the Mississippi River, measuring 150 feet (46 m) in height. It includes "two upside down twists and two vertical rolls over a track length of 863 feet (263 m)"; in some places, riders traverse speeds of 62 miles per hour (100 km/h). Pandemonium was removed at the end of the 2011 season to make room for this new roller coaster.
Seasonal events 
The haunt at Discovery Kingdom is their annual Fright Fest Halloween event. Two haunted houses, scare zones, and many ghouls are added throughout the park. Tinseltown Terror haunted house is located in the park's bumper car ride. Brutal Planet haunted house is normally located in the Roar plaza near where Zonga used to be. The scare zone is located between Ocean Discovery and the entry plaza. This is where the world famous cockroach eating contests are held.
In 2009, two haunted houses were replaced in October with newer ones.
New for 2007, Discovery Kingdom introduced the Wheel of Fright and the Coffin of Fear for Fright Fest. 2007 also brought the addition of the Kamp Khaos haunted house, replacing Brutal Planet. Kamp Khaos was also placed in a new location for a Haunted House, inside the Monsoon Falls water ride lagoon.
The other major seasonal event, Holiday in the Park, made its debut November 23, 2007. The event featured Santa Claus, holiday themed shows, and other seasonal treats. Discovery Kingdom also featured the world's largest Christmas tree as part of the celebration. The tree was 125 feet (38 m) tall and had a diameter of 4 feet (1.2 m). Due to its size, a Chinook helicopter was needed to set it into place.
Rides and attractions 
Roller coasters 
- Boomerang: Coast to Coaster – A Vekoma Boomerang clone. This was the first roller coaster to open at the park.
- Kong – A Vekoma Suspended Looping Coaster and the second roller coaster to open at the park. Kong was relocated from the defunct Opryland Themepark in Nashville, Tennessee where it was called The Hangman, following the 1997 operating season. In 2007 the ride's entrance was moved to Oasis Plaza near Medusa. Riders now walk under the ride to enter.
- Roar – A wooden coaster built by Great Coasters International Inc., ROAR! was the first wooden coaster to feature Millennium Flyer trains. While the ride is a near clone of Six Flags America's ride of the same name, Marine World's version was designed with tighter turns to enhance the feeling of speed. ROAR! will no longer hold the title for the tallest and fastest wooden coaster in Northern California when California's Great America opens up "Gold Striker" for 2013.
- Medusa – Built by Bolliger & Mabillard of Switzerland, Medusa stands 150 ft tall (46 m) and reaches speeds of 65 mph (105 km/h). When the ride opened in 2000, it featured one of the tallest vertical loops in the world at 128 ft tall (39 m). Medusa used to share its name with its sister coaster at Six Flags Great Adventure (before it was converted to Bizarro) but features a layout more similar to that of Kraken, another B&M Floorless roller coaster built at Sea World Orlando in 2000. The ride was the first coaster to ever feature the "Sea Serpent" element, a variation of B&M's popular "Cobra Roll" element. At 3,985 ft long (1,215 m), Medusa is the longest roller coaster in Northern California and shares the height record with V2: Vertical Velocity as the tallest coaster in Northern California, also located at the park.
- V2: Vertical Velocity – California's first and only Spiraling Impulse Coaster, Vertical Velocity was built by Intamin and opened in 2001. It stood 186 ft tall (57 m) and reached speeds of up to 70 mph (110 km/h). In 2002, the park was forced to modify the ride so that it no longer exceeded 150 ft (46 m) due to local height restrictions. In doing so the front tower was tilted to a 45-degree angle and the reverse tower lowered to 150 feet (46 m). The ride still holds the record for fastest coaster in Northern California at 70 mph (110 km/h).
- Cobra – A 26-foot-tall (7.9 m) family coaster located in Oasis Plaza, Cobra opened in 2000.
- Roadrunner Express – A kiddie coaster located in the park's Looney Tunes Seaport section. Roadrunner Express opened in 1999.
- Superman: Ultimate Flight – a steel Premier Rides roller coaster that opened in June 2012.
Thrill rides 
- VooDoo – VooDoo opened in 1998 and was the first HUSS Top Spin on the west coast. VooDoo is located at the back of the park near Tava's Jungleland.
- Tazmanian Devil – A HUSS Frisbee ride. Opened in 1999, riders board a giant disk that spins and swings at high speeds for approximately 2 minutes.
- Hammerhead Shark – Riders board one of 2 giant arms and experience 7 vertical loops before completing their 90 second ride. This was the first Zamperla Hawk48 Ride to ever be built; opened in 1998.
- SkyScreamer – A Funtime Star Flyer. Climb 15 stories and swing at 150 feet (46 m) up in the air at 43 mph (69 km/h). SkyScreamer is the same height as Medusa and opened in 2011.
Family rides 
- Wave Swinger – A Zamperla swing ride; opened in 1998.
- Boardwalk Bumper Buggies – Bumper cars; opened in 1998.
- The Ark – A swinging ship; opened in 1998.
- Scat-A-Bout – A Scrambler type attraction; opened in 1999.
- Wave Jumper – A circular ride where riders board Orca shaped gondolas and rise into the air approx 15 ft (4.6 m); opened in 1999.
- Monkey Business – Teacups ride; opened in 1998.
- Thrilla Gorilla – Riders board one of the 16 cars and spin around a giant gorilla at high speeds with sudden changes in elevation; opened in 1998.
Water rides 
- White Water Safari (Intamin River Rapids water ride) – opened in 1999, it is a classic white water raft ride. Featuring an overhanging waterfall and several 'rapids' area. Two locations with four coin-operated hoses each allow non-riders to spray riders.
- Monsoon Falls (Intamin Spillwater water ride) – opened in 1998, it is a short brief ride which begins on a 50 ft (15 m) climb, the riders are then subjected to a full drop that results in a splash tall enough to reach pedestrians exiting the ride on the overcrossing walkway. This ride also has several coin-operated hoses allowing observers to spray riders and pedestrians on the walkway.
Kiddie rides 
Looney Tunes Seaport (formerly Popeye's Seaport from 1997 through 1998)
- Acme Foam Factory – A large indoor play structure where children and their parents can shoot foam balls at targets or each other; opened in 1997. All foam balls were removed in 2007. Six Flags has not commented on why the balls were removed. Balls returned early summer 2007 after the installation of plastic flaps at the door.
- Acme Water Works – A large interactive water play structure; opened in 1997.
- Pepe Le Pew's Rafts of Romance – Small tea cup ride; opened in 1997.
- Elmer's Weather Balloons (Zamperla Samba Balloons)- A circular ride where kids can spin their cars while the ride changes elevation; opened in 1997.
- Sylvester's Pounce and Bounce (Zamperla Jumpin' Star) – A children's drop ride; opened in 1999.
- Bugs Buccaneer (Sartori kiddie swinging ship); opened in 1999.
- Taz's Typhoon (Zamperla Lolly Swing) – A children's version of the swing ride; opened in 1997.
- Daffy's Deep Sea Dive (Zamperla Crazy Sub) – A yellow submarine where kids and their parents experience quick ascents and sudden drops; opened in 1997.
- Foghorn Leghorn's Seaport Railway (Zamperla Rio Grande) – Train ride; opened in 1997.
- Yosemite Sam's Flight School – Pint sized planes where children control how high they go; opened in 1997.
- Seaport Carousel – A small merry-go-round with exotic animals; opened in 1997.
Tava's Jungleland (all rides opened in 2006)
- Tava's Elephant Parade – A circular ride where children board small elephants and control their height.
- Congo Queen (Zamperla Rockin' Tug) – A large Tugboat that rocks and spins.
- Safari Jeep Tours – Riders board small Jeeps and traverse a track through animal attractions.
- Nairobi's Lookout Balloons (Zamperla Samba Tower) – Riders board 4-person gondolas and are taken to heights of 35 feet (11 m). Riders are able to spin themselves which allows this tame observation tower become a high speed thrill ride.
- Frog Hopper – A circular ride with "hopping" cars.
- Safari River Journey – A slow ride for small children that spins in a small water way. Closed in 2007, Replaced by animal attraction in October 2008.
- Monkey Around (Zamperla Swing Ride) – A tame swing ride that offers no changes in elevation.
- Zoe's Tree House (SCS Interactive “Treehouse”) – A large outdoor play structure with slides and look out towers.
Seaside Junction (all rides opened in 2007 in the former Thomas Town; then the rides where rethemed to Seaside Junction in time for the 2011 season.)
- Air Penguins (I.E. Park Mini Flight) – A circular ride where children board small helicopters and control their height. It was known as Harold the Helicopter from 2007–2010 in Thomas Town; and now rethemed in 2011.
- Merlin’s Seaside Tours (I.E. Park Unknown Model Name) – It was known as Bertie the Bus from 2007–2010 in Thomas Town; and now rethemed in 2011.
- Seaside Railway – Train ride around the Shark Experience passing: Tidmouth Shed, Lake Hackenbeck, Hackenbeck Station. It was known as Thomas the Tank Engine from 2007–2010 in Thomas Town; and now rethemed in 2011. Riders used to board into Thomas' coaches Annie and Clarabel. The engine still has Thomas' whistle.
Upcharge attractions 
- Skycoaster – Riders are harnessed to two long cables and hoisted 100 ft (30 m) above the park. The riders must pull a ripcord and drop within 6 feet (1.8 m) of the ground before swinging back and forth for a few minutes. Prices range from $35 for a Single Rider, $40 for a Double (two fliers), and $45 for a Triple (three fliers).
- TRS: Thunder Road Speedway – A high speed go cart track near ROAR!. Prices range from $10 per driver, $4 per passenger. Ride duration is 7 minutes.
- Rockwall Climbing Challenge – Riders climb a 45 ft (14 m) rock wall. Price range is $7 per 1 climb.
Animal attractions 
- Shark Experience – Guest gets to go "underwater" with sharks as they travel on a moving walkway through an underwater tunnel showing an underwater shark habitat. Species on display include Sandbar sharks, Blacktip reef sharks, Zebra Sharks, and Nurse Sharks. Featured in the film 50 First Dates.
- Jocko's Walrus Experience – Guest can get face to face with the park's 3 Walruses. Walrus training sessions may also be scheduled throughout the day. Featured in the film 50 First Dates.
- Dolphin Discovery – Guest can pay $129.99 per person and receive an in-water training session with the park's Bottlenose dolphins. An underwater viewing glass for one of the pools in the complex is accessible to all guests. Home to the park's female and elder dolphins.
- Dolphin Encounter – Located in Ocean Discovery, guests can feed, play and touch Bottlenose dolphins for a small fee or view them at the pool for free. Home to the park's younger male dolphins.
- Stingray Bay – Located in Ocean Discovery, guests can touch live Southern stingrays.
- Penguin Passage – Located in Ocean Discovery, guests can come face to face with African penguins.
- Seal Cove – Located in Ocean Discovery, guests can feed California sea lions and Pacific Harbor seals.
- Alligator Isle – An exhibit featuring North American alligators.
- Butterfly Habitat – Guests enter a large, humid glass building filled with exotic butterflies.
- Tava's Elephant Trails – Guests can view African and Asian Elephants as well as ride them and face them in a tug-o-war (part of the Elephant Show).
- Cougar Rocks – Guests can get up close to the park's four Cougars.
- Odin's Tiger Island – Home of the park's Bengal and Siberian Tigers. Guests can view tigers on exhibit.
- Nairobi's Giraffe Dock – Guests can get up close and feed the park's Giraffes.
- Leo's Lion Lair – The park's African Lion exhibit.
- Merlin's Dolphin Harbor – Home to the park's dolphin show, guests can also get up close to the Bottlenose Dolphins at the viewing windows in the main plaza. Home to the park's performing male dolphins.
- Odie's Sea Lion Stadium – Located in Ocean Discovery, home of the park's California sea lion, Pacific Harbor seal, and Asian small-clawed otter show.
- Bird Theater – Home of the bird show featuring predatory birds and birds of flight.
- Odin's Temple of the Tiger – Home to the new Odin's Temple of the Tiger Show, with a larger amphitheater for guests to view the new show. A small exhibit for viewing the Tigers is located outside the stadium.
- Animal Nursery – Home to new arrivals and animals with special needs.
- Reptile Discovery – Located in Tava's Jungleland, guest can view various reptiles.
- Lorikeet Aviary – Located in Tava's Jungleland, guests can interact with the beautiful birds as well as feed them nectar.
- Fennec Fox Exhibit – An open air enclosure allows guests to view these quick desert animals.
Past rides/attractions 
- Starfish – A circular Chance Trabant ride located near Ski Stadium. The ride was removed after two accidents sent people to the hospital after being thrown from the ride. The ride area is now the Air Penguins ride in Seaside Junction.
- Shoreline Express – The park's train system that transported guests from Shark Experience to Animal Adventure near Jambo. Shoreline Express was removed before the 2006 season to make room for Tava's Jungleland and the newly remodeled Lakeside Pavilion. A small area of track surrounding Shark Experience is currently being used for Seaside Railway.
- Zonga – Built in 2003, this coaster was originally named "Thriller" and traveled Europe, as it was built by Anton Schwarzkopf. For a short time, it also operated as "Texas Tornado" at Six Flags Astroworld. Zonga operated for 2 years at the park. The ride regularly opened about two hours after the park and had frequent breakdowns, which contributed to closing down the ride. The ride stood silent for the 2005 season and was moved to the Discovery Kingdom parking lot where it sat throughout the 2006 season, leaving a large empty concrete area at the front of the park. In early 2007 the ride was shipped off after being purchased.
- Jambo – One of the first Zamperla "Joker" rides to be installed in the US, the ride opened in 1998 in the rear of the park near VooDoo. The ride operated for the beginning of the 2006 season, but shut down before summer operation. Shortly after, all rides of the same model in the Six Flags chain shut down, and none have reopened. Jambo was removed in the winter before the 2007 season as well as its sister ride, Trailblazer, at Six Flags Great America.
- 'Round the World Ferris Wheel – A Ferris wheel with balloon gondolas; opened in 1998. In 2007 the ride was removed to make way for the new children's area.
- Turbo Bungee – Riders are harnessed to bungee cords and jump on a trampoline reaching heights where they are capable of front and back flips. Price was $7 per person for 2 minutes.
- iWerks 4D Theater – The theater has been known as either DinoSphere, Stargate, or iWerks Turbo Theater although it has played 7 different films in its time. This was the original thrill ride to be built at the park; opened in 1997 as a 3D theater, it was updated for the 2007 season to include 4D effects which include water sprayers, seat vibrators and bubbles. The theater did not open for the 2008 season due to high maintenance costs. The building now houses uniforms and other material for park employees.
- Safari River Journey – A small children's boat ride that was closed due to lack of rider-ship. Located in Tava's Jungleland.
- Greased Lightnin'
- Pandemonium – Opened on May 23, 2008 as Tony Hawk's Big Spin, renamed to Big Spin in late 2010 and then Pandemonium in early 2011. This spinning coaster originally themed to the legendary skateboarder Tony Hawk will take riders in four-passenger "Skateboards" and spin them through over 1,300 ft (400 m) of track at 31 mph (50 km/h). Pandemonium has also been awarded by the National Six Flags Corporation as the friendliest and cleanest of them all. Closed on January 1, 2012, to make room for Superman: Ultimate Flight and was relocated to Six Flags México as The Joker, set to open in 2013.
- Shouka Stadium – Home of the park's Orca named Shouka. Guests can view Shouka at the viewing windows in the back of the stadium in between shows. Also was home to Merlin and Cupid, Atlantic bottlenose dolphins. It occasionally served as temporary homes the park's other bottlenose dolphins over the years. On August 20, 2012, Shouka was moved from Six Flags to SeaWorld San Diego after Shouka and Merlin had to be separated due to compatibility issues. The stadium is currently on the map as Toyota Stadium.
Park names 
- Marine World – 1968-Mid 1970s
- Marine World Africa USA – Mid 1970s–1997
- The New Marine World Theme Park – 1998
- Six Flags Marine World – 1999–2006
- Six Flags Discovery Kingdom – 2007 – present
There have been countless complaints from various animal rights groups about the treatment of animals at Six Flags. They claim that most of the animals, such as lions, camels, tigers and giraffes, are kept in small, inadequate enclosures. These organizations have also complained that animals sensitive to loud noises, such as fennec foxes and flamingos, are surrounded by roller coasters and loud speakers. One of the complaints involves the treatment of elephants. In Defense of Animals, an animal rights group, is against the idea of elephants performing, and find the elephant enclosure to be too small and barren.
See also 
- Burstyn, Rochel. "Let's Go To Six Flags Discovery Kingdom". Binah Bunch, June 28, 2012, pp. 26–27.
- "Six Flags Discovery Rides Ranked by Rider Vote". Theme Park Critic. August 17, 2011.
- Brown, J. M. (June 6, 2007). "Six Flags to buy Discovery Kingdom". Vallejo Times Herald. Archived from the original on June 9, 2007. Retrieved December 8, 2008.
- MacDonald, Brady (November 25, 2010). "Six Flags amusement parks prepare for thematic makeovers". LA Times. Retrieved November 27, 2010.
- MacDonald, Brady (September 1, 2011). "Six Flags unveils new attractions for every park in 2012". Los Angeles Times. Archived from the original on September 1, 2011. Retrieved September 1, 2011.
- "Six Flags Discovery Kingdom to Present the Biggest Christmas Tree in the World" (Press release). PR Newswire. October 22, 2007. Retrieved November 5, 2007.
- Voyager (2008-11-06). "Welcome to my Wanderjahr". Daveurope.blogspot.com. Retrieved 2013-03-17.
- Media related to Six Flags Discovery Kingdom at Wikimedia Commons
- Official website
- Six Flags Discovery Kingdom at the Roller Coaster DataBase