Scientists have yet to reach the bottom of the Taam Ja' Blue Hole in Mexico's Chetumal Bay, which new measurements hint could be connected to a labyrinth of submarine caves and tunnels. When you ...

We ventured deep inside a river cave and found a mysterious blue hole. Could it lead to an underground spring, or something even more incredible? Join us as we explore its depths and uncover the ...

Andros Island in the the Bahamas features a hidden world of blue and black holes, pockmarking the coastline and interior.

The team specifically referenced Krubera-Voronya, the deepest-known cave, which is 7,188 feet (2,191 meters) deep. Location of the blue hole and images of it at (B) 16 feet deep, (C) 65 feet deep ...

They also found stalactites — a kind of icicle-shaped formation that usually hangs from the roof of a cave — which proved the Great Blue Hole was once a dry cave home to prehistoric life.

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 ...