3 Sæson
20 Episode
Big, Bigger, Biggest - Season 3 Episode 3 Afsnit 3
Over 4 million people use the London Underground every day. Find out how four key inventions in a series of landmark metro systems helped it become the biggest subway in the Western world.
- År: 2011
- Land:
- Genre: Documentary
- Studio: National Geographic
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- Direktør:
- Cast: