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Extreme Engineering
Season 3 · Episode 5
Gotthard Tunnel
0.0January 1, 2006
The Gotthard Base Tunnel underneath the Swiss Alps will be the world's longest rail tunnel upon completion in 2015.
Playback serverIf a title won’t play, switch servers.
Season 3 · Episode 5
0.0January 1, 2006
The Gotthard Base Tunnel underneath the Swiss Alps will be the world's longest rail tunnel upon completion in 2015.