The history of swimming pools date back to Greeks and Romans but later on the concept was adopted by the British. The swimming pool situated beside the sea in Chile is the biggest in the world, having a capacity to store 66 million gallons of water and has a depth of 115 feet. The length of the pool is 1000 yards and the total area it occupies is 20 acres. The pool has already won the Guinness Book of Record of the largest pool of World. The pool, which took $1 billion for construction, has an annual maintenance cost of $2 million.