Deep in the farthest reaches of Pettyjohn Cave, we stumbled upon something incredible - a massive cluster of crystals tucked away where few people go. This video documents the journey through tight ...

Carlsbad Caverns National Park in New Mexico is home to one of the most impressive cave systems in the world. Below you ...

Half a mile below the surface of the earth, in a cave too hot to explore without an ice-packed suit, NASA scientist and Nat Geo explorer Penny Boston clambers around glassy crystals that are ...

Flowstone sparkles like a "sugar cookie" in Crystal Cave below Sequoia National Park. The cave reopened this month after natural disasters had left it inaccessible for four years.

Exploration Place is bringing the excitement with a full lineup of summer camps running now through Aug. 8 for kids ages 7 to 13.

A remarkable rock archway, referred to as the Song of the Sea or Zawn Pyg, adorns the southern side of the beach, often brimming with crystal clear water.

Caves have been used as a natural habitat since ancient times, and our ancestors once resided in them. As time and age evolve, caves slowly lose their original functionality, yet never ever lose their ...