Videos from Yosemite National Park show the iconic "Firefall" phenomenon glowing at Horsetail Fall inside California's crown ...

Kilauea volcano spewed a 400ft (122m) lava fountain in Hawaii. Dubbed 'Episode 10' of the ongoing Halema'uma'u eruption, the ...

One of the most active volcanoes in the world is Kilauea on the Big Island of Hawaii. It has been erupting on and off since Dec. 23.

Hawaii’s Kilauea volcano roared to life with a jaw-dropping 400-foot lava fountain, the latest spectacle in its relentless weeks-long eruption cycle, according to the U.S. Geological Survey (USGS).

Alaska, largely unspoiled wilderness, looks like something out of The Lord of the Rings.

The Yellowstone Seismic Network is designed to record ground shaking due to earthquakes. But earthquakes aren’t the only ...

Often seen simply as a gateway to the Galápagos, this compact little country lends itself ideally to a 10-night road trip ...

Both visitor centers at Saguaro National Park in Tucson will be closed one day a week amid federal budget cuts. Here's what ...

Tourists climbing Sicily's Mount Etna volcano at night in sneakers and light clothing to get a close-up view of an ongoing ...

The Savonoski Crater is a round hole in Alaska's Katmai National Park that has defied scientific explanation ever since it ...

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