Richard Enters Tunnel Machine That s Chewing The Rocks Under The Alps | Richard Hammond s Big

Richard goes to where most of mankind had never imagined being! He is inside of a tunnel machine that is chewing its way through the rocks under the Alps. 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