More than 900 feet beneath a mountain in northern Mexico, there’s a hidden chamber that almost doesn’t look real. Massive, glass-like crystals stretch in every direction, some as long as a city bus.

Seventeen years ago, two brothers who worked for Industrias Peñoles were mining a tunnel underneath the Naica Mountain in Chihuahua, Mexico. They accidentally stumbled upon the Sistine Chapel of ...

Add Yahoo as a preferred source to see more of our stories on Google. The interior of the Cave of Crystals in Mexico with a person for scale. The Cave of Crystals is an underground cavern filled with ...

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Wearing an ice-pack vest, Mario Corsalini stands by a giant rosette of gypsum in the Naica Mine's crystal cavern. A multifaceted "butterfly" crystal clings to the wall in the Naica Mine's Cave of ...

These huge gypsum crystals in Mexico's Naica caves, some up to 12m long, have been growing for tens of thousands of years -- but scientists have only now discovered what's inside them. "We've ...

In a cave below a mountain in the Naica mine of Chihuahua, Mexico, gypsum crystals have grown as big as trees. But researchers now report that loss of water may damage the crystal surfaces (Cryst.

In January 2006 Speleoresearch & Films and the Team la Venta started a three year exploration campain to discover the Naica cave, Chihuahua, Messico. "It seems like walking into an oven. You're hit by ...

Getting your Trinity Audio player ready... Editor’s note: Entry into the Sulphur Cave is prohibited and can result in death or harm to your health. Members of the public should not enter the cave.