Proposed tall buildings and structures

Some tall structures and skyscrapers have been proposed that have not yet been built, and may never be. Some structures have been proposed, but construction was never begun, or if begun never completed, and the plans have subsequently been abandoned.

Proposed structures

All the structures mentioned here would be among the tallest structures in the world if built.

• The Space Elevator is a hypothetical structure that would consist of an approximately 36,000 km (22,000 mi) long cable connecting a point on or near the equator to an object, possibly a captured asteroid, in geostationary orbit.
• A sub-orbital or mini version of the Space Elevator to access near-space altitudes of 20 km (12 mi) has been proposed by Canadian researchers. The structure would be free standing and actively guyed over its base. The tower would be utilized for tourism, communications, wind generation and reduced cost space launch.
• The Launch loop concept has been proposed for the purposes of orbital launch which would be 80 km high, and would have a cost of around $10 billion.
• The X-Seed 4000 is the tallest building ever fully envisioned. The X-Seed 4000 "was never meant to be built," says Georges Binder, managing director of Buildings & Data, a firm which compiles data banks on buildings worldwide. "The purpose of the plan was to earn some recognition for the firm, and it worked." Its proposed 4,000 m (13,000 ft) height, 6 km (3.7 mi) wide sea-base, and 800 floor capacity could accommodate five hundred thousand to one million inhabitants.
• The Dubai City Tower is a proposed 400 floor, 2,400 m (7,900 ft) tall building to be built in Dubai, consisting of 6 outer buildings entwining a central core.
• The Shimizu Mega-City Pyramid is a proposed project for construction of a massive pyramid over Tokyo Bay in Japan. The structure would be approximately 14 times higher than the Great Pyramid of Giza, and would house 750,000 people. If built, it will be the largest man-made structure on Earth. The structure would be 2,004 m (6,575 feet) high and would answer Tokyo's increasing lack of space.
• The Al Jaber Tower in Kuwait City designed by Italian architect Omero Marchetti, part of the planned "ethic city". If built the Al Jaber Tower would reach 1852 m.
• A mile-high Eco-Tower in London, consisting of 500 stories and 1500 metres tall.
• The Bionic Tower is a proposed vertical city, an extremely large building designed for human habitation, designed by Spanish architects Eloy Celaya, and Mª Rosa Cervera and Javier Gómez Pioz. It would have a main tower 1,228 m (4,029 ft) high, with 300 stories that would house about 100,000 people.
• The Kingdom Tower is a skyscraper proposed to be built in Saudi Arabia. If completed, it will stand 1 kilometer high (3,280.84 ft).
• Murjan Tower is a Swedish company's proposal for a supertall skyscraper in Bahrain. Designed by the Danish architect Henning Larsens Tegnestue A/S, it is expected to be 1,022 m (3,353 ft) in height and comprise 200 floors.
• The proposed Mubarak al-Kabir Tower in Madinat al-Hareer (City Of Silk), (Kuwait) by British engineers Eric Kuhne and Associates is projected to be 1,001 m (3,284 ft) in height.
• The proposed Sky City 1000 is a possible future urban supertall skyscraper project aimed at helping put an end to major congestion and lack of greenspace in the Tokyo, Japan metropolitan area. The plan consists of a building 1,000 m (3,281 ft) tall and 400 m (1,312 ft) wide at the base, and a total floor area of 8 km² (3.1 sq mi).
• The proposed Buenos Aires Forum is a possible supertall skyscraper that will be built in Buenos Aires. If built, it will be 1,000 m (3,300 ft) tall.
• Miapolis is a proposed supertall skyscraper planned for construction on Watson Island in Miami, Florida. If approved, constructed, and completed the building would stand at 3,200 feet (975 m), with 160 floors.
• DIB-200 is a possible mixed use supertall skyscraper project proposed by Japanese Kajima Construction, and designed by Sadaaki Masuda and Scott Howe, that if built, would be 800 m (2,625 ft) tall.
• Noida Tower, 710 m (2,330 ft) tall, is proposed for a small metro city in Delhi's NCR region.
• Dream Tower, 665 m (2,182 ft) tall, is a proposed tower to be built in Seoul, South Korea, it will have 150 floors, is planned to be completed in 2016.
• The Digital Media City Landmark Building, is proposed for construction in Digital Media City, Seoul in South Korea, is expected to be 640 m (2,100 ft) tall and have 130 floors. When completed, it would be the second tallest building in the world with the tallest observatory and hotels in the world. Construction is expected to start in 2010,and will be completed in April 2015.
• In USA at several sites, broadcasting towers with heights between 600 and 610 metres are planned according to the FCC-database. Some of them will be built close to existing towers of similar height, making them the tallest twin-towers in the world.

Name	Town	Height		Coordinates	FCC-Entry
Central Missouri State Broadcasting Tower	Syracuse, Missouri	609.6 m	2,000 ft (610 m)	38°37′36.0″N 92°52′04.0″W
Hitchcock Univision Radio Tower	Hitchcock, Texas	609.6 m	2,000 ft (610 m)	29°18′00.6″N 95°06′40.3″W
Agate American Media Tower	Agate, Colorado	609.5 m	2,000 ft (610 m)	39°26′14.9″N 103°59′44.8″W
Busterville Vertical Properties Broadcasting Tower	Busterville, Texas	609.5 m	2,000 ft (610 m)	33°24′12.0″N 102°06′50.0″W
Metcalf Pegasus Broadcasting Tower	Metcalf, Georgia	609 m	1,998 ft (609 m)	30°40′52.0″N 83°58′21.0″W
Beasley Broadcasting Tower	Immokalee, Florida	608.7 m	1,997 ft (609 m)	26°17′37.3″N 81°11′29.3″W
Hoyt KKDD-FM Tower	Hoyt, Colorado	608.1 m	1,995 ft (608 m)	39°55′26.9″N 103°58′26.3″W
Wiliam Smith Broadcasting Tower	Walker, Iowa	607 m	1,991 ft (607 m)	42°18′58.9″N 91°50′46.2″W
Plymouth Pappas Telecasting Tower 2	Plymouth County, Iowa	603.5 m	1,980 ft (600 m)	42°35′12.0″N 96°13′20.0″W

• The Port Tower is a proposal for Karachi, the financial capital of Pakistan. If completed it would reach a height of 593 m (1,947 ft), representing the independence year of Pakistan (1947).
• An as yet un-named 555 metres (1,821 ft) skyscraper has been approved by the Prime Minister of Cambodia to be built in the capital, Phnom Penh.
• GIFT Diamond Tower is a skyscraper proposed for Gujarat International Finance Tec-City in Gandhinagar in the Indian state of Gujarat. The proposed height is 410 metres (1,345 ft) in height. Diamond Tower and the core CBD of GIFT will comprise a total of 25,800,000 sq ft (2,400,000 m²).
• Solar updraft tower, Buronga, Australia, planned height between 400 m (1,300 ft) and 1,000 m (3,300 ft), state uncertain.
• The Lanco Hills Signature Tower is a 400 m (1,312 ft) skyscraper proposed for construction in Hyderabad, India.

This list is incomplete; you can help by expanding it.

Abandoned proposals

• The Houston Tower was an envisioned skyscraper that would have been nearly 1.3 miles (2.1 km) tall (6864 ft/2092 m) and taken up nine city blocks in Houston.

• The Aeropolis 2001 was a proposed project for construction of a massive 500-story high-rise building over Tokyo Bay in Japan. It was proposed to be a 2,000 m (6,562 ft) high building.

• The Illinois, envisioned by Frank Lloyd Wright in 1956, was to be a mile high (1609 m / 5280 ft) skyscraper in Chicago.

• Nakheel Tower (previously Al Burj) was a proposed skyscraper, planned for Dubai, UAE. It was expected to be approximately 1,400 m (4,600 ft) tall but the project was cancelled in November 2009 as a result of the 2009 financial crisis in Dubai.

• Until late 1995, there were plans to rebuild the collapsed 646 m (2,119 ft) Warsaw Radio Mast to its previous height on the same site, using the basements of the old mast. Although some refurbishment of the basements started, work was canceled after violent protests by local residents, who feared harmful radiation effects from the high-power transmitter served by the antenna. A new transmission facility with two smaller masts measuring 330 and 289 m was built as a replacement in 1998-99 at Solec Kujawski.

• The Miglin-Beitler Skyneedle in Chicago was to be 610 m (2,001 ft) tall in 1988.

• Eaton's / John Maryon Tower was a planned 503 m (1,650 ft) (686m to spire) tall building in Toronto in 1971.

• The Grant USA Tower was planned by developer Harry Grant, who started New York Apple Tours. The building was to be completed in 1986 in Newark, New Jersey and to be the tallest hotel, tallest building and tallest structure. Harry Grant went bankrupt and the building never broke ground.

• The Palace of Soviets in Moscow, planned in 1932, was to be 415 m (including a 100 m Lenin statue), and would have been the tallest building in the world at the time if completed. Construction was halted during World War II, during which the uncompleted structure was partially dismantled; its foundations were later to serve as the world's largest open-air swimming pool before being razed in 1995.

• During the Russian October Revolution of 1917, Vladimir Tatlin designed a structure named The Monument to the Third International, which was to serve as the international headquarters of the Komintern. Better known as the Tatlin Tower, the structure was to rise to a height of 400 m (1,312 ft), which would have made it by far the tallest building in the world at that time, but the time and resource shortages that resulted from the Russian Civil War halted the project.

• Watkin's Tower in Wembley, London was planned in 1891 to surpass the Eiffel Tower by 50 m (164 ft), but construction stopped before that height was reached due to unstable land. The tower remnants were dismantled in the 1900s, and the site was redeveloped as Wembley Stadium.

• Phare du Monde, was a project for a 701 metres tall observation tower for the world exhibition in Paris, 1937. It was planned as concrete tower similar like modern TV tower, but also with a ramp for drive up access.

• 7 South Dearborn in Chicago was planned in 1999 to be 610 m (2,001 ft).

• Construction was cancelled on the Grollo Tower (named after the architect) in Melbourne's developing Dockland precinct in April 2001 after Melbourne's Docklands Authority ruled it out of the tender for development of the Batman Hill's precinct. The area is now occupied by a mixture of smaller commercial and residential buildings. The Grollo Tower would have been the world's tallest building at the time at 560m (1837ft) tall.

• A series of super-tall sky-scrapers were planned for the major Australian cities of Melbourne, Brisbane, Sydney and Perth from 1985-95 but were all cancelled. The plans included (in order of height) the Grollo Tower (mentioned above), Brisbane Central Tower (450m/1476ft, Brisbane), Minuzzo Tower (450m/1476ft, Brisbane), CBD-1 (445m/1459ft, Sydney), Melbourne Plaza (338m/1109ft, Melbourne), City Tower (305m/1000ft, Sydney) and the Westralia Tower (287m/941ft, Perth). The buildings would have been some of the tallest buildings in the world at the time, but were cancelled mainly due to their unnecessary heights which would have dwarfed all surrounding buildings

• The Ultima Tower is a hypothetical two-mile (3 km) high skyscraper by architect Eugene Tsui that would be 3,217 m (10,554 ft) tall and comprise 500 stories if built.

• The Millennium Freedom Tower was a project to be located in Newport, Kentucky, United States was originally proposed in 1998 to be dedicated on Dec 31, 1999. The original height was a proposed 1,234 feet (376 m) and was later lowered to 1,103 ft (306 m). Pilings were driven in 1998, but construction never continued above ground.

• The World Science Tower was to be one of the world's tallest buildings, proposed in 1964. It was to be located near Larkspur, Colorado, U.S.A. Its design would have had an amusement park at the base.

• The 500 m tall Dragon Tower in Jakarta, Indonesia was cancelled in 1990 due to the economic crisis.

• International Business Center is a proposed skyscraper to be constructed in Seoul, South Korea for a height of 580 m (1,900 ft),it will have 130 floors planned to be completed in 2013.

• At Psary, Poland a 440 metres tall tower is proposed for distributing DVB-T signals from the satellite station to TV broadcasting sites. It will be, if built, the tallest man-made structure in Europe outside Russia.

• The Chicago Spire designed by Santiago Calatrava was intended to be the tallest building in the western hemisphere as well as the tallest residential building in the world.

This list is incomplete; you can help by expanding it.

See also

• List of tallest buildings and structures in the world
• List of cities with most skyscrapers