North America's deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new ...

Louisiana's best-kept secret sits in Kisatchie National Forest. Wolf Rock Cave is our state's only cave, with prehistoric artifacts and Civil War legends.

For decades, geologists have hypothesized that Yosemite Valley was shaped by a combination of natural forces, including tectonic uplift, water erosion, and glaciation. However, a ...

Rising like red-hued skyscrapers in the Sierra Nevada, the towering sequoias here echo the giants in Yosemite, right in a charming Gold Rush town.