My visit to the Ctrl+Alt Museum retrocomputing museum in Pavia, Italy, blew my mind. Why? The hundreds of photos I took speak for themselves, go see them now.
Opened a year and a half ago, the museum is a new and little known geeky gem packed with all sorts of vintage computing hardware and stuff. It's run by a non profit group of passionate collectors, enthusiasts, and makers who also do outreach and education activities.