World's Longest Tunnel

Name: World's Longest Tunnel
Released: 2016-04-13
Duration: 42 min

S2 E5 April 13, 2016 0h 42m

Source:

Overview

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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