1 person bested this!
The Gotthard Base Tunnel (GBT) is a new railway tunnel beneath the Alps in Switzerland which is expected to come into use in 2016. With a route length of 57 km (35.4 mi) and a total of 151.84 km (94.3 mi) of tunnels, shafts and passages, it is the world's longest rail tunnel, surpassing the undersea Seikan Tunnel in Japan. (wiki)
Well, people, that's amazing but I'm not sure I'll go in there for a ride.