Home / Series / Impossible Engineering / Aired Order / Season 7 / Episode 2

World's Toughest Tunnels

A team of engineers are overhauling London's underground infrastructure to build a world-class sewer system. Using cutting-edge tech and the latest construction methods, they work to transform a centuries-old network into a modern-day masterpiece.

English
  • Originally Aired January 8, 2020
  • Runtime 42 minutes
  • Content Rating United States of America TV-G
  • Network Science Channel
  • Created July 22, 2021 by
    cookieguru
  • Modified July 22, 2021 by
    cookieguru