This small museum describes the history of the Swedish penal system and gives a flavour of life inside Kronohäktet prison before it was turned into a hotel/hostel. You can visit a typical cell used between 1845 and 1930, read about Sweden's last executioner, Anders Gustaf Dalman, and see a scale model of the guillotine imported from France and used only once, in 1910 (the actual guillotine used is stored at the Nordiska Museet, though not on display). Visitors can view an assortment of prison paraphernalia, including the sinister hoods worn to hide an accused person's identity until sentenced (used until 1935). Nowadays, the Swedish government tries to avoid incarceration and a quarter of the 12,000 criminals sentenced each year are electronically tagged rather than imprisoned. Book in advance if you want a guided tour in English.