[World's 15 most spectacular swimming pools]3. Pelican Hill, California, United States

 

 

 

Named after the Coliseum in Rome, this is the world’s largest circular pool with a diameter stretching 41.5 meters.

Vaulted arches, corniced columns and an amphitheater of terraced decks sit above the 1 million hand-set glass mosaic tiles which line the bottom, and it’s all surrounded by ultra deluxe private cabanas in a resort that aims to recreate classical Italy in Orange County. 

The Resort at Pelican Hill, 22701 Pelican Hill Road South, Newport Coast, California, United States; +1 949 467 6800; www.pelicanhill.com