The Cave of Crystals, 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 ...

For anyone who's seen the original Richard Donner "Superman" movie, the cave might even conjure memories of the titular hero's Fortress of Solitude, with giant translucent crystals jutting out ...

Trips which may become real inside physical replicas of the cave; maybe the only way to visit once it is no longer accessible due to the end of mining activities. Giant crystals The amazing ...

NGC goes inside one of the greatest natural marvels on the planet - a giant crystal cave described as Superman's fortress, with magnificent crystals up to 36 feet long and weighing 55 tons.