Devil's Pool: swimming on the edge...looks AMAZING (and a little scary)
Blue Holes in Espiritu Santo Island, Vanuatu - Located just west of Fiji, on the Espiritu Santo island of Vanuatu you'll find some of the most crystal clear blue waters you've ever laid eyes on. Called blue holes, they're large, deep pools of clear, fresh water that come to the surface through layers of limestone and coral.
the great blue hole | Belize I've been here - Carnival Legend will take you to Belize! Beautiful place!
To Sua Ocean Trench - Tosua literally means a Giant Swimming Hole. 30 meters deep and is accessible via a long ladder to the pool.Overlooking the ocean is a beach called Fagaoneone meaning white sand whereas opposite is a lava field with blow hole, tide pools and walking paths along the rocks near the ocean’s edge