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

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.

When an asteroid made Meteor Crater in northern Arizona, it did more than leave the Earth’s best preserved impact crater. According to new research, the earthquake that the collision caused induced a ...

Geology is full of detective stories about the Earth's history, and a new paper in Geology by University of New Mexico ...

In central Oregon between Crater Lake and the Columbia River Gorge, Bend is a top outdoor destination. Travelers will find ...

Visitors explore Wind Cave National Park in South Dakota. With 130 miles of explored passages, it is among the world’s longest cave systems and a popular spot for spelunking enthusiasts.