Building Giants Season 4 Episode 3 - Underground Mega Highway

Airdate: 2020-May-20

Episode summary:

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. 

About Building Giants series:

Building Giants showcases how key technological innovations enable giant superstructures to be built. Footage filmed during construction along with...Show more >