The largest swimming pool in the world is located in Chile, measuring over 1,000 yards long and covering 20 acres. It holds 66 million gallons of water and has a deep end of 115 feet. The man-made saltwater lagoon took five years to build at a cost of nearly $1 billion, and has an annual maintenance cost of $2 million. It has attracted large crowds since opening last month and its crystal clear waters allow visibility to the bottom even in the deep areas.

1. The world largest SWIMINGPOOL

2. the Guinness Book of Records named the vast pool beside the sea in Chile as the biggest in the world. It is more than 1,000 yards long, covers 20 acres, had a 115ft deep end and holds 66 million gallons of water. But if you fancy splashing out on one of your own - and you have the space to accommodate it - then beware: This one took five years to build, cost nearly 1billion and the annual maintenance bill will be 2million. The man-made saltwater lagoon has been attracting huge crowds to the San Alfonso del Mar resort at Algarrobo, on Chile 's southern coast, since it opened last month. Its turquoise waters are so crystal clear that you can see the bottom even in the deep end. It dwarfs the world's second biggest pool, the Orthlieb - nicknamed the Big Splash - in Morocco , which is a mere 150 yards long and 100 yards wide. An Olympicsize pool measures some 50 yards by 25 yards. Chile's monster pool uses a computer- controlled suction and filtration system to keep fresh seawater in permanent circulation, drawing it in from the ocean at one end and pumping it out at the other. The sun warms the water to 26c, nine degrees warmer than the adjoining sea.