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 Aral Sea was an endorheic lake lying between Kazakhstan and Uzbekistan. The name roughly translates as “Sea of Islands”, referring to over 1,100 islands that had dotted its waters.
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