French film
Naïca: La grotte aux cristaux géants
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2009DocumentaryDir. Ruben Korenfeld
The story
Discovered by accident in one of the largest zinc and silver mines in northern Mexico, the Naica cave, filled with enormous selenite gypsum crystals, contains a highly toxic atmosphere. After years of preparation, a team of speleologists, biologists, and NASA members are exploring this natural wonder.