Declared a UNESCO World Heritage Site in 1996 – along with six other areas surrounding Belize's barrier reef – the Great Blue Hole remains ... many underwater creatures (expect the occasional ...

The coral and other sea creatures add to the excitement ... It highlights the complex relationships within the Belize sinkhole phenomenon. The Great Blue Hole is a top attraction in Belize ...

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 ...