One of the more controversial additions to the Grand Canyon's surroundings, the Grand Canyon Skywalk is a large, semicircular bridge with a transparent glass floor, allowing tourists to walk out ...

The lunar canyons Vallis Schrödinger and Vallis Planck are extraordinarily deep, and scientists now know the valleys were ...

Recent visitors agreed that the Grand Canyon of the Yellowstone is an unbelievable ... South rims instead of just one or the other (the North Rim has more lookout points than the South Rim).

With 22 national parks and monuments to its name, Arizona boasts some of the most astonishing landscapes in the country, from the Grand Canyon to the towering buttes of Monument ...

This January, lots of hotel news came across TPG's desk, including a new Holiday Inn at the Grand Canyon, reservations opening at the forthcoming Rosewood Amsterdam and more.

Rraft through challenging whitewater rapids or hike along awe-inspiring cliffs with incredible views at this under-the-radar ...

At the Grand Canyon Trust we are committed to honoring the inherent value of a diverse, equitable, and inclusive society and conservation movement. We envision a Grand Canyon and a Colorado Plateau ...

The vast valleys of Vallis Schrödinger and Vallis Planck demonstrate the incredible forces that shaped the face of the Moon.

Shutterstock The Grand Canyon State is a Certified Stargazing Paradise Arizona has some of the darkest, clearest skies in the ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

Scientists have discovered that two massive lunar canyons, deeper than the Grand Canyon, were formed in a matter of minutes ...