Into the Lost Crystal Caves
HD
6
0 minNGC 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.
Country:
CA, MX, USGenre:
DocumentaryReleased:
2010-10-09Languages:
N/ACompanies:
National Geographic