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Impossible Engineering - Season 2 Episode 5 World's Longest Tunnel

Trailer
How did engineers move mountains to build the longest and deepest rail tunnel on the planet? Discover how 25 million tons of rock were moved to build this modern wonder, the Gotthard Base Tunnel.

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First Air Date: Apr 13, 2015

Last Air date: Sep 01, 2021

Season: 10 Season

Episode: 82 Episode

Runtime: 42 minutes

IMDb: 6.70/10 by 15.00 users

Popularity: 5.185

Language: English

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