They are white and opaque, they seem to be ice. The sight takes your breath ... in the State of Chihuahua, Mexico. It is a true geode: a cave completely covered with transparent selenite crystals ...

Hidden beneath the surface of Mexico’s ... s largest underwater cave system. Stretching an astonishing 215 miles, this submerged labyrinth of tunnels, caverns, and crystal-clear waterways ...

Related: Cave of Crystals: The deadly cavern in Mexico dubbed 'the Sistine Chapel ... Rain and snowmelt that seeped into the caves during the last ice age also went to work on the limestone ...

Crystal Ice Cave, California True confession ... Ultimate Ice Skating Adventures Giant Ice Cave, New Mexico Ice caves in New ...