WREN’s at Station X
If you are interested in cryptography or codebreaking, and have an interest in World War II, then you should try to get to Bletchley Park. I haven't been... yet. It is on my list of things to achieve. There is an excellent blog post that highlights what it was like for the women of Bletchley and what it was like getting there.
"What is X?"... "Well, It's not Y."