2. Hells Canyon – Deepest canyon in North America
The Grand Canyon in Arizona may be immense,offering nearly 277 river miles in length, but for precise depth, Hells Canyon in eastern Oregon,eastern Washington and western Idaho victories hands-down. The deepest canyon in North America,at its inner, it falls 8,043 feet from the tip of He Devil Peak to the Snake River, which moves more than 1.6 km below the canyon’s west rim on the Oregon side and 2,300 m below the peaks of Idaho’s Seven Devils Mountains range to the eastern.