The World's Largest Swimming Pool is situated in the San Alfonso del Mar, Algarrobo, Chile. It is 1,013 m (3,324 ft) long and has an area of 8 ha (19.77 acre). Can you imagine it's size? This swimming pool utilizes a technology developed by the Chilean company Crystal Lagoons, which uses water pumped from the Pacific Ocean, that is then filtered and treated for supply to the pool. Take a look at the pictures of the World's Largest Swimming Pool.