That's a satellite photograph of the world's largest swimming pool located at the San Alfonso del Mar resort in Chile. A Daily Mailarticle has some photographs of the beautiful resort in Chile.
This massive saltwater pool holds the Guinness Book of Records for its size. The pool is over 1,000 meters long and holds 66 million gallons of water. The pool's deep end is very deep at 115ft. The pool was built by a company named Crystal Lagoons that uses filtered salt water from the Pacific Ocean to maintain the pool. This technology keeps even the pool's deepest end crystal clear.
