A fascinating relic from the Cold War, the underground facility was finished in the 1960s and is built to withstand a nuclear attack. A response to the nuclear threat posed by the Soviet Union at the time, it stayed in operation for 24 years and was once monitored by military personnel around the clock.

Here you can see how the different subterranean areas are cleverly linked via underground passages and staircases. Of course, being a military facility, it's likely the bunker had more than one exit and hidden hatches and secret tunnels would have been installed to allow any workers to get out safely in the event of an attack or disaster.

Tour the Cold War nuclear missile bunker untouched for 60 years