9 of the world's most extreme lakes

Check out the biggest, deepest, saltiest and all-around strangest bodies of water Earth has to offer.

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Lake Baikal Lake Baikal (Photo: Mikhail Markovskiy / Shutterstock)

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The deepest lake in the world

At an impressive depth of 5,387 feet, Lake Baikal is the deepest in the world. Located in the Russian region of Siberia, it's also the oldest in the world — at an estimated 25 million years old. And Lake Baikal takes home another blue ribbon as the largest freshwater lake in the world (by volume).

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