Dean's Blue Hole, Bahamas

Dean's Blue Hole, Long Island, Bahamas
Source: https://commons.wikimedia.org/wiki/File:Dean_Blue_Hole_Long_Island_Bahamas_20110210.JPG
Author: Ton Engwirda


Dean's Blue Hole is the deepest underwater sinkhole in the world. It is located in a bay to the west of Clarence Town in Long Island, Bahamas. The hole is 663 ft (202 m) deep, and is filled with seawater. Surrounding it is sandy sea bottom. As the sea here is usually very clear, the blue hole appears as a dark blue patch in the sea.

Dean's Blue Hole is under 6 m (18 ft) of sea. It is visible from the surface, due to clarity of the seawater. The walls of the hole are almost vertical. There are no marine life within the hole except for an occasional shark.

Although Dean's Blue Hole is regarded as the deepest underwater sinkhole, there are other water-filled sinkholes that are deeper, including Zacatón (335 m, 1,099 ft) in Mexico and Pozzo del Merro (392 m, 1,286 ft) in Italy. It is however the deepest with its entrance under the sea.

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