The Great Blue Hole, located off the coast of Belize, has long fascinated scientists ... Read also: Turtle sets deep-sea record with 4,408-foot dive in Solomon Islands Inside heist at Tenerife ...

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 ...

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.

TJBH was identified as the world’s deepest blue hole during a scuba diving expedition that ... the Dahab Blue Hole in Egypt and the Great Blue Hole in Belize.