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

The rustic lodge that offers one of the most sought-after experiences at Grand Canyon ... also take the North Kaibab Trail, which starts at the top of the North Rim, to the canyon bottom, but ...

The rustic lodge that offers one of the most sought-after experiences at Grand ... the canyon bottom via the South Kaibab Trail, which has no water-filling stations. Hikers can also take the North ...

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 ...

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

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 ...

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 ...

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 ...