Step into an underground lava cave hike in Arizona, where cool air, dark tunnels, and rugged volcanic walls turn a simple walk into a bucket list adventure.

As Italy's Mount Etna continued to erupt, three daredevil skiers were captured skiing down the snowy slopes. Video footage shows the skiers coming down the slopes with glowing, molten lava flowing in ...

Nature rarely does straight lines. If you look at a forest, a rock, or a coastline, you see all sorts of shapes and chaos. But visit the coast of Northern Ireland or the high deserts of Oregon, and ...

Continuous lava fountaining began about 2 p.m. today within Kilauea’s Halemaumau crater as the 12th episode of the ongoing summit eruption continues, according to Hawaiian Volcano Observatory ...

Due to a weird quirk of geology, New Mexico's Bandera Volcano Ice Cave never warms above 31 degrees Fahrenheit, even when ...

Scientists said “episode 18” of Kilauea volcano’s ongoing eruption restarted at 7:45 a.m. today with lava flows of 6 to 10 foot high from the south vent. The lava flow resumed about one-half mile ...

A lava flow from Kilauea Volcano on Hawaii's Big Island has reached the ocean for the first time since 2013. Lava began flowing on May 24, and traveled 6.5 miles over Pulama Pali to reach the ocean on ...