3 Stagione
20 Episodio
Big, Bigger, Biggest - Season 3 Episode 3 Episodio 3 (2011)
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.
- Nazione :
- Genere : Documentary
- Studio : National Geographic
- Direttore :
- Cast :
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