(Into the Lost Crystal Caves)

Content: NGC 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.

Countries:

Canada,

Mexico

Genres:

Documentary

Runtime:

0 minutes

Year:

2010

Directors:

Gonzalo Infante Castañeda

)}

Production companies:

National Geographic

Actors:

Narrator (voice)

Crews:

Writer

Director

Director

Director of Photography

Editor