Giant Crystal Cave

Next PrimeTime Airing Next PrimeTime Airing Next PrimeTime Airing Next PrimeTime Airing Next PrimeTime Airing Next PrimeTime Airing Sun Nov 22 10P Sun Nov 22 9P Sun Nov 22 8P Sun Nov 22 10P Sun Nov 22 9P Sun Nov 22 8P

OverviewOverviewVideoVideoPhotosPhotosFactsFactsCave of Giant CrystalsCave of Giant CrystalsHotter than HadesHotter than HadesRare conditionsRare conditionsShow Caves in AmericaShow Caves in AmericaMore Show Caves in AmericaMore Show Caves in America

Giant Crystal Cave

It looks like Superman's fortress. Hidden deep beneath the surface of the Earth is one of the greatest natural marvels on the planet: a giant crystal cave with crystals up to 36 feet long and weighing 55 tons. But this scorching cavern could kill humans after just 15 minutes of exposure. Follow an international team of scientists as they don high-tech protective gear to safely unlock the secrets of the crystal cave. They'll attempt to answer the questions What are the crystals made of? How did they reach such superheroic proportions? And is there life here?

Remind Me

Enter your email address so NGC can remind you when next this show airs.

Choose Airdate

And/Or

Mobile Number

Carrier

Remind Me I have read and agree to the Terms of Service

Terms & Conditions Please note that show times occasionally change. Always consult NGC's online TV schedule for the latest information. If you sign up to receive a mobile reminder, you are authorizing NGC program reminders to be sent to your mobile phone. You will only receive reminders for shows that you request. This is a free NGC service, but standard text messaging rates apply. NGC mobile program reminders are offered by the following carriers: Alltel, AT&T Wireless, Cingular Wireless, Nextel, Sprint PCS, T-Mobile®, Verizon Wireless. You can end this service anytime by texting STOP to 64288. If you have trouble using this feature, please email site comments to website@natgeochannel.com.

NGC privacy policy