Geologists have uncovered compelling new evidence that reshapes the understanding of Hells Canyon, America’s deepest river ...

About 2,000 feet deeper than the Grand Canyon, Hells Canyon was rapidly carved when a lake spilled over about 2.1 million ...

Dedicated as a state nature preserve, a hike at Greene County's Canyon Forest Nature Preserve is scenic, tranquil.

Fly above the striking pink, red, and orange rock layers of the Claron Formation, the foundation of Bryce Canyon. Formed during the Eocene Epoch, 56 to 33 million years ago, its vibrant hues come ...

In the 19th century, many people believed that landscapes like the Grand Canyon were shaped by volcanoes and earthquakes. But one American geologist named John Newberry had different ideas.

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.

An aerial view following the collapse of the "Double Arch" geological formation in Utah's Glen Canyon National Recreation Area. Aug. 9, 2024. National Park Service ...

Arch-like rock formations can be seen elsewhere in the National Park system. Arches National Park, which is located in southeastern Utah, has more than 2,000 natural stone arches.

Miles of hiking trails loop through the dramatic boulders of Texas Canyon Nature Preserve at the Amerind Museum in Dragoon, AZ. Here's how to try it.

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.