I wouldn’t want to play Marco Polo in this pool.  The South American resort of San Alfonso del Mar in Chile sports a swimming pool approximately eight hectares (~20 Acres) in size.  The gigantic man made salt water lagoon stretches over 1,000 yards and contains an incredible 250,000 cubic meters of water (66 million gallons).  Though the water is crystal clear you may want to be extra careful not to drop that new engagement ring in the deep end; which measures 115 ft.

The Guinness World Records has acknowledged the lagoon as being the world’s largest swimming pool, they’ve also announced that the Guinness book is the most useless reference guide on the planet.

Biochemist and businessman, Fernando Fischmann is the founder of Crystal Lagoons, the company responsible for designing this nearly $2 billion artificial paradise.  The project took five years to complete and is equivalent in size to an incredible 6,000 standard domestic pools.

The 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 annual maintenance bill should be around $4 million.