The highest bridges in the United States are as spectacular as the tallest buildings and skyscrapers across the country.

Scientists found new evidence that Earth’s crust is peeling underneath the Sierra Nevada in California. The process might be ...

Spared in the first Trump administration, Arizona's wildlife-rich San Rafael Valley is now targeted for border wall construction.

Perfect West Coast National Parks road trip plan, from Joshua Tree to Olympic National Park. Stops in the Sierras, Central ...