The Hidden Hallway Behind Mount Rushmore And Why It’s Unfinished | Blowing Up History

Mount Rushmore was designed to be more than a monument to American presidents and its ambitious plans were part of the reason why. 🇬🇧 Catch full episodes of your favourite Discovery Channel shows on discovery+: https://bit.ly/3ekIODl Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK