Torture Room Museum
Torture Room Museum information
Under the clock tower on the right (if heading out of the old town) is the small, dark Torture Room Museum, which shows how fingers were smashed and prisoners burned with coals. The 'Spanish boot' was a happy little foot-crushing device. If it's closed, ask at the medieval arms collection for entry.
It's not made clear, but you can visit the History Museum, the medieval arms collection, and the Torture Room Museum for a combined ticket price (about the same price as the student discounts for all three).