Impossible Engineering S07E02 - World's Toughest Tunnels (London's Super Sewer)
Impossible Engineering (2015)
S07E02 World's Toughest Tunnels (London's Super Sewer)
Episode Overview
A group of engineers is revamping London's underground system to create a state-of-the-art sewer network. Employing advanced technology and innovative construction techniques, they aim to upgrade a centuries-old infrastructure into a contemporary marvel.