Belize's Great Blue Hole is one of Earth's most mysterious features. Anyone peering into the 125 metre (410ft) deep pit will wonder what secrets and stories lie beneath. Now, scientists have ...

Narrator: There's a massive underwater sinkhole off the coast of Belize that extends ... descent to the bottom of the Blue Hole. Their mission was to create a 3D map of the sinkhole's interior ...

Moreover, the Great Blue Hole is just a speck amidst the endlessly rich expanses of the Belize Barrier Reef, second in size only to Australia's Great Barrier Reef, making this legendary dive ...

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.

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.