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Antarctica’s Blood Falls looks like a bleeding glacier.

This five-story waterfall flows from an ancient subglacial lake with water that's three times saltier than seawater. The bright red color comes from iron-rich water that oxidizes when it contacts air. The falls contain microorganisms that have evolved to survive without light or oxygen for millions of years.

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The Stone Forest of Madagascar features razor-sharp limestone needles.

The Tsingy de Bemaraha contains limestone formations so sharp they can cut through equipment and skin. The hostile...

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The Waitomo Glowworm Caves in New Zealand create natural light shows.

Thousands of bioluminescent larvae create stunning blue light displays on the cave ceilings. The glowworms use their light...

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There’s a lake in Tanzania that turns animals into statues.

Lake Natron is so alkaline that it can turn animals into calcified statues. The lake's pH levels can...

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