Andros island in the Bahamas has the largest collection of the blue holes. Andros is the largest island in the Bahamas and it more than 200 Blue Holes. Blue Holes are usually sink holes or underwater caves in shape of a circle.
The Andros Barrier Reef in the Bahamas is situated into the Tongue of the Ocean. The Tongue of the Ocean is the region of much deeper water in the Bahamas.
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