They analyzed photos from NASA's Lunar Reconnaissance ... Width and depth of the Grand Canyon along the Bright Angel hiking ...

Planning your next vacation to the extraordinary, iconic, stupendous Grand Canyon? Carved out by the Colorado River over ...

Plan a winter trip to the Grand Canyon with our winter guide to the Grand Canyon. Don't let a little snow keep you from ...

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 ...

For travelers on the North Rim, the North Kaibab Trail is the ... Travelers can take the Grand Canyon Lodge Hiker Shuttle to the North Kaibab Trail that runs twice each morning during peak season ...

NORTH RIM, Ariz. - Three trails in Grand Canyon National Park are closed because of a chlorine leak, according to a post on the park's Facebook page. The chlorine gas leak occurred in the Roaring ...

The trails have since reopened NORTH RIM, Ariz. - Some trails in Grand Canyon National Park were closed because of a chlorine gas leak, according to a post on the park's Facebook page.

From Grand Canyon to Petrified Forest to Saguaro National Park, here are the best things to do in Arizona's most beautiful places.

It would be hard to argue with Grand Canyon ... drive the north rim in the morning and south rim in afternoon. If time permits, take a Navajo-led tour into the inner canyon.

The Grand Canyon's three Inner Corridor trails had to be shut after workers discovered dangerous chlorine gas at the Roaring Springs waterfall ...

Discover how snow, ice, Christmas delights and Northern Lights transform these landmarks and destinations around the world.

I found big adventure and warm weather in these national-park units spread across the Southeast and Southwest ...