Plot: Unearth the technological leaps forward that have allowed the world's longest tunnel - the Gotthard Base Tunnel - to be built. The Gotthard Base Tunnel stretches 57 kilometres through the heart of the Swiss Alps
Big, Bigger, Biggest - Season 2 - Tunnel (Episode 1)
Episode Aired On:
Tuesday, July 28 2009
15 years ago
Tuesday, July 28 2009
15 years ago
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Episode 2
John Michie
Peter Oxley