You need to visit the "Enigma" complex at Bletchley Park, near Milton Keynes. Much of "Station X" is preserved there, with Enigma machines, Bombe machines, and Colussus, one of the world's first computers.
The guided tour is excellent, explaining some of the techniques of code-breaking, before touring the site.
This was the scene of war-winning activity during the Second World War. Churchill described Station X as "The goose that laid the golden egg, but never cackled."
Truly amazing.