Cave of the Crystals of Naica, Chihuahua, Mexico

Imagine you’re a miner looking for new ore deposits deep beneath a hillside cave. You hold up your lantern, and to your surprise and astonishment, giant milky-white crystals emerge from the darkness, filling the horseshoe-shaped cave. What luck! These immense luminous crystals are larger than telephone poles. They dwarf the amazed miners and shine in all directions from the brown …