Building Giants · SEASON 4

Underground Mega Highway

Episode 3 · 2020-05-20

★ N/A
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Season 4Episode 3★ N/A/10
  • Documentary
  • Reality

Episode 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.

45 minutes

Season 4 episodes