With a competent guide, active volcano treks are both safe and worth the climb. Here are some of the biggest active volcanoes ...

Arenal Volcano National Park, Costa Rica: Biodiversity in Volcanic Rainforests Three-toed sloth. Photo by William Phipps, via Unsplash. Costa Rica’s most active volcano until 2010, Arenal now offers ...

Arenal Volcano National Park, Costa Rica: Biodiversity in Volcanic Rainforests Drietenige luiaard. Foto: William Phipps, via Unsplash. Costa Rica’s most active volcano until 2010, Arenal now offers ...

Hawaii's Kilauea volcano sent jets of lava shooting over 1,000 feet into the air early Friday morning, marking another explosive episode for the active volcano.

Jets of searing hot molten lava spewed more than 1,000 feet into the Hawaiian air Friday from the Kilauea volcano.

Hawaii's Kilauea volcano is erupting again in spectacular fashion, sending lava shooting 1,000 feet into the sky, according to the United States Geological Survey.

A cropped comparison of two USGS Hawaiian Volcano Observatory webcam images showing changes to the landscape of Kilauea summit region over the past six months. Twenty-five episodes of lava ...

The Hawaii Volcano Observatory says lava fountains were reaching over 330 feet Wednesday and would likely go higher before subsiding.