... that might interest you. Of course, I don't know if you've already heard about it; but I recently learned about the House of Terror museum in Budapest. The building once served as secret police headquarters under the short-lived Arrow Cross regime during the last year of World War II and also for the Communist regime that soon followed. Who knows how many Hungarian citizens were tortured and murdered in that building. It definitely is worth seeing, simply from the standpoint of having an interest in history. If I could go to Budapest, I definitely would see it. No doubt about it. I've posted a link below to the Wikipedia article about the museum.
http://en.wikipedia.org/wiki/House_of_Terror
Of course, as I really don't need to say, you can do a Google search on "budapest house of terror" to find more links as well; and there are also several You Tube videos that feature the museum.
I hope this little bit of information will be useful to you. Sorry I don't have any more tips to give you. I hope you have a nice trip to Budapest.