This is where you have to go if you want to see the biggest crystals on the planet.

Found in Naica mine of Chihuahua, Mexico, the Crystal Cave of Giants is a chamber hosting some of the most amazing crystals you’ve ever seen. They look like silver or golden giants, and reach 11 meters in length, 1.5-2 meters in diameter and 55 tons in weight. Until 2007, the reason for their abnormal size was unknown, but now it’s clear it has something to do with mineral rich water the crystals bathed in for millions of years and the constant temperature than never drops bellow 150 degrees Fahrenheit.

Ever since it was uncovered, The Crystal Cave of Giants has sustained considerable giant from the outside world, so the mining company operating in the mine has installed iron doors to seal off access.

Photo: Alexander Van Driessche/Wikimedia Commons