A collection of reproduced medieval torture and judicial punishment instruments, housed in a building just off the main tourist route. The exhibits cover the full range of devices used in European legal proceedings from roughly the 12th to the 18th century — the rack, the strappado, the iron maiden, the pillory — with explanatory panels that place them in their historical and legal context. It is grim, but it's informative: the panels make the point that most of these instruments were used not in dungeons by sadists but in formal court proceedings as legally sanctioned means of obtaining confessions.
Whether this is your kind of thing depends entirely on you. It is popular with older children and teenagers, and less so with people who just want to look at towers. The museum is open daily and admission is charged.