By Eric Yang
on 10.7.10

Impossibly large caverns 300 meters below the surface. 36 foot translucent gypsum crystals weighing 55 tons. Scorching 136° temperatures and intense humidity – enough to kill a human after 15 minutes of exposure. No, this isn’t the planet Krypton, this is Cueva de los Cristales near the town of Delicias, Mexico. Discovered 10 years ago during mining operations, the rare discovery has been captured by an adventurous documentary team braving the elements. The 2-hour special, “Into the Lost Crystal Caves” will premiere on the National Geographic Channel Sunday, October 10.

Photography by Carsten Peter/Speleoresearch & Films