Join us as we explore the legendary Four Entrance Cave on Pigeon Mountain, Georgia – all captured on GoPro. This wild cave system offers tight crawls, massive chambers, and multiple entry points that ...

For the last 25 years, intrepid groups of teens have set out to explore, document and preserve some of the most fragile ...

A lava tube is a cave that forms after a volcanic eruption. You can visit the country's third-longest tube in Washington ...

The 1980 eruption of Mt. St. Helens — which began with a series of small earthquakes in mid-March and peaked with a cataclysmic flank collapse, avalanche, and explosion on May 18 — was not the largest ...