The Grand Canyon on the Colorado River in the Southwestern USA state of Arizona is the world's deepest canyon, with a maximum depth of amost 2,000 meters (over 6k ft.). The giant gorge also gets many votes for being the most visually stunning. Especially at sunset, and ESPECIALLY when filmed aerially with a drone. If you have your doubts check out this drone video of one of the most iconic scenes in America. Thanks to contributor and drone pilot Lexern for serving up this spectacular video of one of the USA's natural wonders.