From the famous Kubla Kahn formation at Kartchner Caverns to the deep history of Colossal Cave, here's what to know about 10 thrilling Arizona caves.

On his first trip to the Grand Canyon Star Party, Dave Eicher joins thousands for a week of lectures, observing, and cosmic wonder.

Grand Canyon will be one of 14 schools competing in the conference next season. The accelerated transition comes after five Mountain West schools announced they intend to depart the conference and ...

A 67-year-old man hiking in the Grand Canyon National Park died on a trail while hiking in extreme heat, which possibly caused hazardous conditions. The Grand Canyon National Park Service said ...

A park employee at the Grand Canyon was exposed to hantavirus, and a separate case of exposure to rabies in the park has also been confirmed.

A 67-year-old Texas man died Tuesday at the Grand Canyon after abandoning an attempt to hike down to the Colorado River.

A 67-year-old man hiking in the Grand Canyon National Park died on a trail while hiking in extreme heat, which possibly caused hazardous conditions. The Grand Canyon National Park Service said ...

A 67-year-old Texas man died Tuesday at the Grand Canyon after abandoning an attempt to hike down to the Colorado River. He turned around and began ascending toward the rim before he was found, acc… ...