Dean's Blue Hole, Bahamas Travel Guide
 Grand Harbour Cay, the Bahamas Author: SempreVolando (Creative Commons Attribution 3.0 Unported)
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.
Guide to Bahamas Hotels
Here's a list of hotels in Dean's Blue Hole that you can book online, with full description, star rating, address, location map, evaluation, and prices as offered by different booking sites. This helps you to make your room booking with the site that offers the best price.
 Dean's Blue Hole, Long Island, Bahamas Author: Ton Engwirda (Creative Commons Attribution 3.0 Unported)
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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