6. Bletchley Park
Fans of the movie ‘The Imitation Game’ will know that Bletchley Park was where codebreakers – especially the genius Alan Turing – broke the German Enigma code during the second world war. This allowed the Allies to spy on German naval communications.
The Bletchley park trust now does a great job of explaining how it was done – great for scientifically mided older children.
Again, it’s a short train ride from London.