The Crystal Cave of Giants located inside the Naica Mine in Chihuahua, Mexico was accidentally discovered in 2001. The heat prevents them from studying this site further. The vibrations are so intense, one worker talked of the deeply mystical and immense dreams he had. He had no words to describe... It lies almost 300 meters below the Earths surface. It is the home to the largest crystals known in the world which are over 11 meters long and weigh 55 tons.