There is a very small one on the outskirts of Lemgo in Germany (about 1hr from Hannover). My grandparents lived there and it was one of the stops on the way back to the UK after I had bought my SC. It is small but has a nice collection of road cars and also a Von Tripps 718rsk and a 917/10. It's worth a look if you're in the area....
http://www.lemgo.net/539.html?&MP=169-1443