Erik Weihenmayer is blind. In this video he climbs one of America's most famous routes; The Naked Edge.
The Naked Edge in Eldorado canyon in Colorado is graded 5.11b and is seven pitches long. The route translates to around E4 and sports some tough climbing on cracks and a chimney, followed by an airy traverse to gain the final steep crack on the top pitch.
Erik says this is the hardest route he has ever climbed.