Starting just west of the Yavapai Geology museum on the canyon rim, visitors can walk backward in time from today toward the oldest rock in Grand Canyon, Elves Chasm gneiss (1,840 million years old).

From Horseshoe Bend to Grand Canyon's Mather Point to the Chiricahua Mountains, these are the Most Treasured Views in AZ.

Visitors to backcountry areas of Grand Canyon National Park can now subscribe to a new emergency warning system that works in ...

Journey across continents to witness nature’s greatest masterpieces,from the vast depths of the Grand Canyon to the vibrant underwater realm of the Great Barrier Reef. This video showcases the ...

Johnny MacLean, Ph.D., the new chancellor at Montana Technological University, described receiving a warm welcome on campus ...

This isn't your typical boat ride. Your best summer experience in Idaho is this scenic jet boat tour in Hells Canyon. It's an ...

It's where natural history perfectly blends with the iconic saguaro cacti, which dominate the park's landscape.

The five newest National Recreation Trails in six states add nearly 400 miles to the network of more than 1,300 trails.

About 2,000 feet deeper than the Grand Canyon, Hells Canyon was rapidly carved when a lake spilled over about 2.1 million ...

Dhaka: There's something unforgettable about the view from above-whether gazing over valleys, cliffs, or oceans. But some of the world's most ...

Trump officials say presidents can abolish monuments created by predecessors, and California's newest ones — Chuckwalla and Sáttítla Highlands — are vulnerable.

It's cut through by the Snake River and is North America's deepest river gorge, at 10 miles (16 kilometers) wide and about 1.5 miles (2.4 km) deep — almost 2,000 feet deeper than the Grand Canyon.