The Mackenzie Delta is formed on the Mackenzie river which is the longest river system in Canada. The delta is a home to vast regions of Boreal forests.
Ox bow lake is a U shaped lake formed when a meander of a river is cut off. This cut off meander creates a free standing water body called Ox bow lake.
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.
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