Yellowstone Grand Canyon is located in Yellowstone National Park, ranked 1st out of 90 attractions in Yellowstone National Park. The Yellowstone Lake in the United States enters a steep canyon about 38 kilometers long, known as the Yellowstone Grand Canyon, after flowing through a gentle hilly area. This is one of the most magnificent and gorgeous scenery of Yellowstone. Here, the rapid river splashes, forming two magnificent waterfalls, roaring into the valley bottom. The first waterfall is 33 meters high, this is the upper waterfall, the second is 92 meters high, called the lower waterfall. The Yellowstone Grand Canyon is formed by volcanic rock that is eroded by geothermal erosion by the Yellowstone River. About 14,000 to 18,000 years ago, the Grand Canyon was connected by three glacier erosion, gradually forming this typical V-shaped canyon. The Yellowstone Grand Canyon was formed about 10,000 years ago, and it is still quite young. One of the best places to watch LowerFalls is UncleTom'sTrail, a branch of SouthRimTrail. The end of the trail is a platform located at the waist of the canyon. From here, the waterfall is like a white-cut cliff, the water gas is half-empty from the bottom of the valley, and the rainbow is across the cliff, which is spectacular.