The San Alfonso del Mar resort in Algarrobo, Chile, houses The Crystal Pool, the largest swimming pool in the world. How big is big? If you try to back stroke your way from one end to the other, you would swim exactly three fifths of a mile, the equivalent of 20 Olympic-sized swimming pools! If you feel like diving, it’s also the world’s deepest pool with a depth of 115 feet.
It opened in 2006, after 5 years of construction, and cost the developers around £1 billion. If you thought your backyard pool was expensive to maintain, this pool has a total area of 19.8 acres, holding 66 million gallons of water. To put things in perspective, that’s 6,000 normal pools! It costs the resort £2 million a year to maintain it. I sure would hate to be the pool boy assigned to clean that pool.