Just three years ago, a group of Idaho men traveled to an unnamed Western state and in an unnamed range of rugged mountains, hiked up a steep trail. At the top, they unraveled climbing ropes, stepped ...

Crystal Cave in Sequoia National Park is reopening for guided tours after a four-year closure due to natural disasters. The cave, formed in 200 million-year-old marble, features unique geological ...

Traveling around Eagle County, it is easy to wonder about the interesting geological features that dot the landscape. While we are blessed with abundant mountain peaks and canyons, there is one ...

Why it's incredible: The cave was created by lava from Mount Fuji and now holds giant ice pillars. The Narusawa Ice Cave is a lava tube that is brimming with icicles and ice pillars at the base of ...

Juneau, the capital of the Last Frontier, serves as a gateway to some of Alaska's most spectacular hidden gems, including the ice caves in the Mendenhall Glacier. Formed about 3,000 years ago during ...

The Aggitis River Cave in Greece is one of the largest and most spectacular river caves in all of Europe. It is located in ...