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 115 ft (35 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. 
  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