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

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

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 ...

Width and depth of the Grand Canyon along the Bright Angel hiking trail from the south to the north rim compared with the ...

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

Learn more about the latest Phoenix area weather forecast and conditions with Most Accurate Forecast from ABC15.

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 ...

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 ...

We're tracking the latest winter storm impacting Arizona. Temperatures are dropping, winds are picking up and we'll see chances for rain and snow across the state.

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