So big you can sail in it

San Alfonso del Mar, an astounding Chilean private resort in Algarrobo, about 60 miles west of Santiago, boasts the world’s largest swimming pool that’s so big you can sail in it.

This saltwater pool, which held the first-ever Guinness world record for largest man-made lagoon, is the exact same crystal-clear turquoise hue of the sea just beyond it.

The pool’s more than a kilometer long, covering nearly 20 acres in area – bigger than 15 football fields – and it holds a colossal 250 million liters of filtered ocean water.