1 online resource (streaming video file) (50 min. 5 sec.) ; 303677591 bytes
Series
Big, Bigger, Biggest ; Series 2, Episode 5
Summary
An examination of the technological leaps behind the construction of the world's longest tunnel - the Gotthard Base Tunnel. It stretches 57 kilometres through the heart of the Swiss Alps. It is deeper than any other tunnel on Earth and paves the way for a vital high-speed rail link between Zurich and Milan. This film explores how this structure was made possible through a series of six engineering breakthroughs. (From the UK) (Documentary Series)