|World's Largest Outdoor Pool (Photos: Spluch)|
Located at the San Alfonso del Mar resort in Algarrobo, the world's biggest swimming pool is about 1,013 meters (3,324 ft) in length and with a total area of 8 hectares (19.77 acres). That's equivalent to 20 Olympic-sized swimming pools!
Chile's enormous pool holds 250 million liters (66 million gallons) of crystal clear seawater and 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.
San Alfonso del Mar resort's pool is also the record holder for the world's deepest at 115 feet!
It reportedly took five years to build, cost nearly $1 billion, and has an annual maintenance bill of $2 million.