Home / Series / National Geographic Documentaries / Aired Order / Season 2010 / Episode 39

Into the Lost Crystal Caves

NGC goes inside one of the greatest natural marvels on the planet - a giant crystal cave described as Superman's fortress, with magnificent crystals up to 36 feet long and weighing 55 tons. A team of experts venture into the cavern, enduring scorching-hot temperatures that could kill a human after just 15 minutes of exposure. They'll push the boundaries of physical limitation to explore a crevasse that could lead to another - and perhaps more spectacular - crystal cave.

English
  • Originally Aired October 10, 2010
  • Runtime 45 minutes
  • Content Rating United States of America TV-PG
  • Network National Geographic
  • Created August 17, 2011 by
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  • Modified August 17, 2011 by
    Administrator admin