Modern-day mining exposed the natural wonder by pumping water out of the 30-by-90-foot (10-by-30-meter) cave, which was found in 2000 near the town of Delicias. "There is no other place on the planet," García-Ruiz said, "where the mineral world reveals itself in such beauty."(Image credit: Nationalgeographic).
(Image credit: Crystalinks).
(Image credit: Canyonsworldwide).
Similarly there is a huge cave of crystals in an old silver mine in Spain.
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