Impossible Engineering

Season 2 Episode 5: World's Longest Tunnel

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.

Genre:

Documentary

Seasons:

10

Episodes:

82

Actor:

Mike Bratton , Susie Sheehy

Quality:

HD

Status:

Ended

First Air:

2015

IMDb:

7.1