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.
Karst landforms are a type of topography formed due to dissolution of soluble rocks like limestone, dolomite and gypsum.Poljes also called as karst fields or karst polje are large flat plains found in karst regions. The word Polje means ‘field’. They are flat floored depression within karst limestone.
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