Did you know the Great Blue Hole in Belize is huge? It’s 318 meters (1,043 feet) wide and goes down 124 meters (407 feet). This amazing hole is part of the Belize Barrier Reef, a UNESCO site. It has ...

Narrator: There's a massive underwater sinkhole off the coast of Belize that extends ... and the cave flooded and collapsed, leaving behind the Blue Hole we see today. Researchers think that ...

Declared a UNESCO World Heritage Site in 1996 – along with six other areas surrounding Belize's barrier reef – the Great Blue Hole remains ... years ago after a cave roof crumbled in, this ...