the Grand Canyon Skywalk is a large, semicircular bridge with a transparent glass floor, allowing tourists to walk out 70 feet from the canyon rim and view the bottom from 4,000 feet above.

This one-day itinerary includes the best of Grand Canyon's South Rim, including El Tovar, Mather Point, Bright Angel Trail and Desert View Watchtower.

A cable hardly wider than my thumb stretched 3,200 feet from where I stood to a tower on the other side of Quartermaster Canyon. This 500-foot-deep fissure was home to the last item on my Grand Canyon ...

Arizona’s giant natural wonder reliably strikes awe, whether tackled from inside or above.

Tacoma, Washington, a smokestack leached toxic lead into the water and air. Living nearby: three men who would become some of ...

Florida’s landscape hides a 120-foot deep secret in plain sight, and it’s not another theme park or beach resort – it’s Devil’s Millhopper Geological State Park, a prehistoric sinkhole that feels like ...

Nestled in the heart of Gainesville lies a geological marvel that defies everything you thought you knew about Florida’s landscape – Devil’s Millhopper Geological State Park, where a massive sinkhole ...

Hells Canyon might be deeper than the Grand Canyon, but it's barely 2 million years old, according to a new study.

In this month’s Canyon Commentary, author Scott Thybony ponders the ancient story of a Hopi boy who embarks on an epic ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon ... that travels to the bottom of the canyon; it will likely take ...

With a designed height of 625 meters between the bridge deck and the Beipan River below — about as tall as two stacked Eiffel Towers — the 2,890-meter-long Huajiang Grand Canyon Bridge in Southwest ...