On the coast of southern Chile lies the world's largest swimming pool at the San Alfonso del Mar resort at Algarrobo. The 1,000 yard long pool opened last month and holds 66 million gallons of water, covering 20 acres. Salt water from the ocean is filtered and circulated through the pool, which is big enough to boat on. View original image.
• Try making a splash in the world's largest swimming pool
• San Alfonso del Mar resort