The Phoenix Suns star posted photos of himself on Instagram at James Turrell's Roden Crater volcano observatory in Flagstaff, ...

You'll feel like you're walking though Hawaii's national park when you tackle this short trail at Craters of the Moon in Idaho.

Just 30 minutes from downtown Flagstaff, Sunset Crater Volcano National Monument offers a striking look at northern Arizona’s ...

Wupatki National Monument is one of the most fascinating historic places in Arizona. The Puebloan ruins are strikingly ...

Wherever you are in Portland, there’s a good chance you’re standing on a volcano. Much of Southeast Portland is part of the Boring Lava Field, an extinct volcanic area pockmarked with the remnants of ...

Volcanoes are exciting and seeing molten lava is a thrill. To see active volcanoes, head to a U.S. National Park that ...

As the oldest and largest island, the Island of Hawaii is dominated by the pair of volcanoes that created the island. At the ...

Hear the words ‘California road trip’ and chances are you’ll picture the coastal splendours of Monterey, Big Sur and Santa ...

For centuries, humans have lived underground. Today, that ancient practice is under dire threat—even as cave life makes more ...

One of Sedona's several vortexes sits close above the road leading up to Sedona Airport. As a local saw goes, "There are only ...

More than 600 cinder cones comprise the 1,800-square-mile San Francisco Volcano Field and its south-central edge of Flagstaff in Coconino County.

High viscosity magma creates steep-sided lava domes wherein low-viscosity magma produces cinder cones. Government Mountain is located in Kaibab National Forest in south-central Coconino County.