Arizona The Grand Canyon is a testament to the earth's artistic powers, with its sprawling vistas and breathtaking colors.

Two such lunar canyons, Vallis Schrödinger and Vallis Planck, stretch over 270 km (168 miles) each, with depths of 2.7 km ...

From supermoons to a total eclipse to the national park’s biggest and best-attended star parties, these are the must-see celestial shows of the year ...

Grand Canyon National Park officials say crews have recovered the body of a 20-year-old California man who apparently drove a ...

A Lukachukai man suspected of flying a drone over the Pinyon Plain uranium mine near the South Rim of the Grand Canyon ...

Zion National Park to Grand Canyon road trip guide • Discover the best route, scenic stops, travel tips, and must-see ...

Wayne Martin Belger set out to make indelible photos of a mystical site on the Navajo Nation. First he needed to relearn how to walk ...

While a visit to the Grand Canyon is mesmerizing and worthwhile, it's not necessarily easy. We consider the closest and most ...