World largest swimming pool uncovered in chile....

   A private resort in Algarrobo, Chile, as having been recognised as the
world’s largest swimming pool in Wikipedia .
“The pool is 1,013 m (3,323 ft) long, covering 8 ha (20 acres), containing some 250 million litres (66 million US gallons) of seawater, with a maximum depth of 11.5 ft. The water is pumped from the Pacific Ocean, filtered, and treated.” – Wikipedia
San Alfonso del Mar resort at Algarrobo, on Chile’s southern coast, measures more than 1,000 yards long, spans 20 acres, is about 11.5 ft deep and holds 66 million gallons of water. It easily dwarfs the Orthlieb Pool in Casablanca, Morocco (nicknamed the Big Splash), which is a mere 150 yards long and 100 yards wide. An Olympic size pool measures some 50 yards by 25 yards by comparison.
The massive man-made saltwater lagoon has been attracting huge crowds to its crystal clear turquoise waters ever since it opened to the public in 2006. The pool took five years to build and was developed by Chilean biochemist Fernando Fischmann together with his company Crystal Lagoons for an estimated $1.5 billion to $2 billion USD total for construction and almost $4 million USD in annual maintenance.
Crystal Lagoons Corporation designed the monster pool with advanced engineering that uses a computer-controlled suction and filtration system to keep fresh seawater in permanent circulation, drawing it in from the ocean at one end and pumping it out at the other. This meant his Fischmann’s company could build “an impressive artificial paradise” even in inhospitable locations.

“As long as we have access to unlimited seawater, we can make it work, and it causes no damage to the ocean.” – Fernando Fischmann
Some claim the Guinness Book of Records named the vast pool beside the sea in Chile as the biggest in the world. In fact, if you head over to Crystal Lagoons’ website awards page you will them listing themselves
THE WORLD’S LARGEST LAGOON in 2007 by the Guinness World Records.