Mexico's Giant Crystal Cave
Humans can only survive roughly 10 minutes unprotected in the cave.
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Key Facts In This Video
The Giant Crystal Cave in Naica, Mexico has giant 12-meter long crystals. 00:11
A human can only survive in the Giant Crystal Cave unprotected for about 10 minutes. 00:40
The Cave of Swords in the Naica Mountain contains lots of selenite crystals. 02:54