An aerial view of the swimming pool at the resort of San Alfonso del Mar in Algarrobo city on the southern coast of Chile

An aerial view of the swimming pool at the resort of San Alfonso del Mar in Algarrobo city on the southern coast of Chile, some 100 km (62 miles) west of Santiago, January 21, 2008. Acknowledged by the Guinness World Records as the world’s largest swimming pool, the lagoon measures 1,013 metres (3,323 ft)) in length, covers an area of eight hectares (20 acres), contains 250,000 cubic meters of water and is navigable in small boats. REUTERS/Eliseo Fernandez (CHILE)