World's Strongest Wall

1st February 2018 45 mins Season 1 Episode 5

Venice's new storm wall is one of the strongest in the world, a 330-ton behemoth that protects the historic city from disastrous flooding.

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Season 1 · Episode 6

Super Tunnel

Engineers are building a ground-breaking new railway line in Copenhagen that features 22 miles of tunnels, 17 brand-new stations, and cutting-edge driverless trains.

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