also known as the Giant Crystal Cave, is a cave connected to the Naica Mine at a depth of 300 meters (980 ft) in Naica, Chihuahua, Mexico. It takes the form of a chamber within the limestone host ...

Naica’s Crystals Cave, maybe the most amazing underground wonder on Earth ... maybe the only way to visit once it is no longer accessible due to the end of mining activities. Giant crystals The ...

Many of the giant selenite beams that crisscross ... especially as gypsum is an especially soft mineral. In fact, the crystals in the Naica cave are so soft you could scratch them using your ...