San Alfonso del Mar

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Aerial view of San Alfonso del Mar.

San Alfonso del Mar is a private resort in Algarrobo, Chile, about 100 km (62 mi) west of the capital Santiago.[1] The resort is recognised as having the world's largest swimming pool.[1][2]

The pool is 1,013 m (3,323 ft) long,[2] covering 8 ha (20 acres),[2] containing some 250 million litres (66 million US gallons)[3] of seawater, with a maximum depth of 11.5 ft (3.5 m).[4] The water is pumped from the Pacific Ocean, filtered, and treated.


The pool was developed by Fernando Fischmann; his Chilean company Crystal Lagoons built the pool, which opened in December 2006. While early estimates put the total cost of construction at about US$3.5 million for the filtration system alone,[5][6] more recent estimates are in the area of US$1.5 billion to US$2 billion total for construction and almost US$4 million in annual maintenance.[3][7][8]


  1. ^ a b "Big Dipper". National Geographic. April 2010. p. 30. 
  2. ^ a b c "Largest swimming pool by area". Guinness World Records. Retrieved 25 May 2012. 
  3. ^ a b Barbara Mikkelson; David P. Mikkelson. "Pool Queue: Worlds Largest Swimming Pool". Snopes. Retrieved 28 October 2012. 
  4. ^ Crystal Lagoons Corporation LLC. "Patent US 8790518 B2". US Patent Office. Retrieved 15 October 2014. Minimal and maximal depths were 1.2 and 3.5 meters, being 2.8 meters the average depth. 
  5. ^ "World's Largest Swimming Pool San Alfonso del Mar". Explorra. Retrieved 28 October 2012. 
  6. ^ Janelle Nanos (22 March 2010). "Today Pic The World's Largest". National Geographic Blogs. Retrieved 28 October 2012. 
  7. ^ Daniel Lim (22 January 2008). "World’s Largest Swimming Pool cost nearly Two Billion Dollars to Build". Slash Gear. Retrieved 29 October 2012. 
  8. ^ Spooky (2 March 2008). "World’s largest swimming pool". Oddity Central. Retrieved 28 October 2012. 

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Coordinates: 33°21′S 71°39.2′W / 33.350°S 71.6533°W / -33.350; -71.6533