Black Canyon of the Gunnison National Park is located in western Colorado, USA. "Several canyons of the American West are longer and some are deeper, but none combines the depth, sheerness, narrowness, darkness, and dread of the Black Canyon." (Duane Vandenbusche, The Black Canyon of the Gunnison).
In the video - views from the South Rim viewpoints, the North Rim (1:16 to 3:11), descending to the river via the Gunnison Route (from the South Rim Visitor Center, 3:40 to 6:05).