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World's Longest Railway Tunnel · Richard ventures 2km beneath the Alps into the world's longest underground railway connection, the Brenner Base Tunnel, riding some giant machines.
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Richard ventures 2km beneath the Alps into the world's longest underground railway connection, the Brenner Base Tunnel, riding some giant machines.
About the programme: Richard Hammond embarks on a global adventure to explore the world’s biggest structures and machines and discover how engineers build, maintain and use them.
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