7 Unexplored Places on Earth

Yucatan Cenotes, Mexico

A Cenote is a sinkhole or a natural pit. It is developed from the collapse of limestone bedrock that exposes groundwater. The Cenotes of Mexico were occasionally used for sacrificial offerings, or for water supplies by the Ancient Maya Civilization. In other countries such as Cuba and Australia, the term cenote has been used to describe similar Karst (a topography formed from the dissolution of soluble rocks such as gypsum, dolomite, and limestone) features.

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