The name "Yellowstone" may have a backyard familiarity, but ninety percent of the national park's two million acres is barely touched and holds much more than what most people see. It's a giant swatch of terrain - much of it remote, some of it dangerous, but all of it commands awe and respect. We'll take you off the road and beyond the hot tourist spots to see the hidden valleys and a 20-mile long canyon, in a Yellowstone you don't know.

(46 minutes)