Impossible Engineering - Season 7 (2020) (season)
Plots(1)
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. (Science Channel)
Gallery (12)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722129_0y5zt6.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722136_rs8vz6.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722137_a3jagc.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722140_ex82xl.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722130_521w2b.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722131_k5ux98.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722132_6pubhb.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722133_zqsapq.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722134_jfgvip.jpg)
Photo © Discovery Networks
![Impossible Engineering - World's Toughest Tunnels - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/168/722/168722135_7dmney.jpg)