Underground Marvels (2019) | All episodes

Gibraltar

Release Date: Sep 25, 2019

Sweden

Release Date: Oct 2, 2019

Switzerland

Release Date: Oct 9, 2019

Kingdom of Salt

Release Date: Oct 16, 2019

Bouzincourt

Release Date: Oct 23, 2019

City of Naours

Release Date: Oct 30, 2019

Jersey War Tunnels

Release Date: Nov 6, 2019

The Maginot Line

Release Date: Nov 13, 2019

Edinburgh Vaults

Release Date: Nov 20, 2019

Dover War Rooms

Release Date: Nov 27, 2019