The NAICA Crystal cave is located 300 meters below ground. filled with enormous, spectacular selenite or moonstone crystals, it reveals its beauty in an atmosphere where the its icy appearance constrasts with the high temperatures in the depths. through the magnificence of its crystals, it leads us down a myriad of paths: scientific, technological, artistic, philosophical and one involving the magic of nature. it also brings us face to face with an unavoidable responsibility: our obligation to protect and preserve it.