Tourism: World's Largest Swimming Pool

World's Largest Swimming Pool: It is more than 1,000 yards long, covers 20 acres, has a 115-foot deep end, and holds 66 million gallons of water. The Guinness Book of Records has named the vast pool beside the sea in Chile as the biggest in the world. But if you fancy splashing out on one of your own -- and you have the space to accommodate it -- then beware: this one took five years to build, cost nearly 1 billion, and the annual maintenance bill will be 2 million. The man-made saltwater lagoon has been attracting huge crowds to the San Alfonso del Mar resort at Algarrobo, on Chile 's southern coast, since it opened last month.