Season 4 · Episode 3 of 8
Aired May 20, 2020
Underground Mega Highway
Wed, May 20, 2020
0 of 8 watched this season
An expert team of engineers use hi-tech explosions and state-of-the-art drilling rigs to tear through solid granite and build an 11-mile underground tunnel, one of the longest in the world.
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Airs
Wed, May 20, 2020
Show
Building Giants
29 episodes
Episode
S4 · E3
in Building Giants