GREEN
03/18/2010 05:12 am ET Updated May 25, 2011

Cave of Crystals: BBC Explores Amazing Crystal Cave in Mexico (VIDEO)

On the next BBC episode of How Earth Made Us (Deep Earth), Ian Stewart, Scottish geologist, explores Mexico's Cueva de los Cristales (Cave of Crystals), one of the largest geological crystal growths.

The episode will also feature the world's deepest hole located in the Iranian desert and the 7,000 year old tunnels of Israel.

Watch the video below and check out the spectacular crystal caves, referred to by geologists as "the Sistine Chapel of crystals."