One of the most interesting and informative places I've been in a long time. International Spy Museum. If you go, give yourself 4 to 6 hours to really take it all in.
Follow
This post is from a few months ago. I just want to point out I do have one regret about the International Spy Museum. We had to leave after being there for 3 hours because of a conference my wife had to attend. Due to that, I never got to see or take a picture with @th3j35t3r's laptop. Sucks, but next time I'll find it!