Hack Green was a radar station in World War two, and went on to play a key role in the Cold War, its long-range radar designed to detect hostile Russian bombers.
With nuclear weapons still in the news, it's a sobering visit. The usual Protect and Survive leaflet is there (hide under the table, built a shelter out of your house doors), which would be funny if it wasn't serious government advice to its citizens.
A huge amount of memorabilia and equipment has been gathered together and displayed in a thoughtful way, with a great soundscape and a smell of damp which I don't think had to be artificially created. There are lots of great signs for the sign enthusiast - my favourites feature here - and best of all there are three bunker cats.