4 Season
29 Episode
Building Giants - Season 4 Episode 3 Underground Mega Highway (2020)
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.
- Country : United Kingdom, United States of America
- Genre : Documentary, Reality
- Studio : Science
- Director :
- Cast : Julian Barratt
