The Giant Crystal Caves of Naica: The Documentary

The Giant Crystal Caves of Naica: The Documentary: "
(For its November issue, National Geographic journeyed to the ‘Sistine Chapel of crystals.’ The one and only thing we'll point out is that documentary filmmakers were photographed there, obviously hinting that a documentary is in the works, most likely for television broadcast. We are now on the lookout for it. Photo by Carsten Peter, Speleoresearch & Films. Source.)

In the Archives:
The Giant Crystal Caves of Naica

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The Rhizotron of Illinois
Accessing the Wilderness, or: A Proposal for a National Park of Abandoned Gold Mines

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(Via Pruned.)