Giant crystals found in Naica min in Chihuahua, Mexico stand up to 36 feet tall and have measured over three feet wide. NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team (U.S ...

A cave sealed in time The Cave of Crystals is essentially a horseshoe-shaped cavity in limestone, its floor covered by giant crystals beaming upwards. It wasn’t easy to explore the cave.

"It seems like walking into an oven. You're hit by the heat and humidity, it's simply unimaginable, it sticks to your skin. You go in fighting temptation to go back out again, while your body sweats, ...

Giant crystals that can reach sizes larger than houses grow at incredibly slow rates, taking as long as a million years to reach more than two stories tall, scientists now find.

But his favorite spot on Earth is where the Giant Crystal Cave of Naica lays buried, about 1,000 feet (300 meters) below the town of Naica, Mexico. "This is the 'Sistine Chapel of crystals ...