Blue holes are extraordinary underwater sinkholes formed in shallow limestone plateaus. From an aerial perspective, they appear as dark blue circles amidst lighter surrounding waters.

and Dean's Blue Hole in the Bahamas probably formed the same way. As the scientists continued down the hole, they found another clue to the past: a light buildup of silt on top of the conch graveyard.

Blue holes are water-filled caverns, or sinkholes, that are found in coastal areas where the bedrock is made of specific ...

Named for its deep turquoise, crystal-clear water, the Blue Hole is located a little over a mile from the heart of Ocho Rios. Past visitors have said a trip to this natural wonder is a must-do ...

Surrounded by cliffs on three sides that form a natural amphitheater, the blue hole is also fringed by a white sand beach and opens onto a shallow lagoon. It's a beautiful sight whether viewed ...

The Blue Hole covers an area of 164,000 square kilometers along the Argentine Continental Shelf, outside the Exclusive Economic Zone, with the following boundaries, to the north parallel 42°32 ...