Home / Series / Building Giants / Aired Order / Season 4 / Episode 3

Underground Mega Highway

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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  • Originally Aired May 20, 2020
  • Runtime 42 minutes
  • Network Science Channel
  • Created June 25, 2020 by
    Administrator admin
  • Modified June 25, 2020 by
    Administrator admin