Narrator: There's a massive underwater sinkhole off the coast of Belize that extends 125 meters into the Earth's crust. It's called the Great Blue Hole. Scuba divers and snorkelers have been ...

Video: Stalactites, a conch graveyard and toxic chemicals: Incredible discoveries at the bottom of Belize's Great Blue Hole as researchers release the first ever 3D map of the sinkhole Richard ...

The Great Blue Hole is a massive marine sinkhole in the Caribbean, situated off the coast of Belize. Its diameter is 1,043 feet, and its depth reaches 407 feet.

The Great Blue Hole, located 62 miles off the coast of Belize in Central America, is one of the most iconic dive sites in the ...

Declared a UNESCO World Heritage Site in 1996 – along with six other areas surrounding Belize's barrier reef – the Great Blue Hole remains one of the world's most distinguished scuba sites.