Home / Series / Project Impossible / Aired Order / Season 1 / Episode 6

Digging Deeper

New technology is allowing us to build underground structures that far surpass any building on earth. South Dakota is building a mile deep structure, inside an abandoned gold mine, to study the universe. London is building a "silent" rail network to prevent gridlock. Mexico City is burrowing 39 miles underneath the city to save it from drowning. On this episode: Sanford Underground Research Lab; London Cross Rail and Mail Rail; Mexico City Emisor Oriente.

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  • Originally Aired June 28, 2017
  • Runtime 41 minutes
  • Content Rating United States of America TV-PG
  • Network History
  • On Other Sites IMDB Official Website
  • Created May 23, 2020 by
    Administrator admin
  • Modified July 28, 2023 by
    kyuhyung78