AirDate: 5/20/2020 |
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Overview: 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. |
Underground Mega HighwayShow: Building Giants --> Season: 4 - Season 4
AirDate: 5/20/2020
|
|
Overview: 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. |