Watch NAICA 2: Beyond the Crystal Cave

A team of scientists and explorers return to one of the most dangerous caverns on the planet to discover if another cave awaits beyond a deadly crevasse. With unbearable high temperatures and humidity, the cave can kill a human being in 30 minutes. As limits are being tested for even some of the most experienced cavers, it's a race against time to explore this underground marvel.

NAICA 2: Beyond the Crystal Cave is a 2010 documentary with a runtime of 46 minutes.