Find out how old the Grand Canyon really is. The Grand Canyon is approximately 280 miles long, and in some places it’s over a mile deep and 18 miles a...
Nik Wallenda wants to walk across the Grand Canyon without a net! That's 1500 ft up! Wallenda comes from a family of tight walkers and says this stunt...
He calls himself the "King of the High Wire." Now, Nik Wallenda plans to cross the Grand Canyon on a tightrope - 1,500 feet or 457 meters in the air ...
See more national park videos at http://parks.mapquest.com/national-parks/featured-parks/. Explore the South Rim and Desert View as park rangers guid...