rhamphotheca: The Cave of the Crystals is a little-explored cave in Naica, Chihuahua, Mexico. Lying 300 metres (1,000 ft) below the surface and connected to the Naica Mine, the main chamber contains some of the largest crystals ever found. The largest
rhamphotheca: The Cave of the Crystals is a little-explored cave in Naica, Chihuahua, Mexico. Lying 300 metres (1,000 ft) below the surface and connected to the Naica Mine, the main chamber contains some of the largest crystals ever found. The largest