The Grand Canyon.
snake river
Amazon River
Colorado river
The largest river in the United States is the Mississippi River. The river is approximately 2,340 miles long, and is the fourth longest river in the world.
New River Gorge National River was created in 1978.
The Arkansas River runs at the bottom of the Royal Gorge. The running water in the river has carved a majority of the Royal Gorge.
Gorge Washington
The area of New River Gorge National River is 294.644 square kilometers.
New River Gorge Bridge was created in 1977.
Sturgeon River Gorge Wilderness was created in 1987.
The Mississippi river is the largest river in North America and the longest river in the United States, but only if you consider the Mississippi-Missouri-Red Rock River as one river; this actual river (as opposed to stupidly misnamed tributaries) is the fourth-largest river in the world, after the Nile, the Amazon, and the Yangtze Rivers.
The Gorges of the World website lists a number of gorges that are popular tourist sites. Among them are the New River Gorge, Cathedral Gorge, Flaming Gorge, Red River Gorge, and Cheddar Gorge.