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 ...

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 ...

Tim Smith Tucked away behind an unglamorous main road, Blue Hole Park is a hidden gem that shows off both the serenity and the thrills of Bermuda's natural beauty. Located within the 12-acre ...

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 ...