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Which natural landmark on Grande Comore is a deep, circular crater lake filled with saltwater?

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Correct answer: Lac Salé

Lac Salé, located near the northern tip of Grande Comore, is a deep, circular saltwater lake formed inside a volcanic crater. Local legends say the lake is bottomless and holds spiritual significance. Because of its high salt concentration, the water is incredibly dense, making it easy for swimmers to float.

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Source: Wikipedia (CC BY-SA)

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