Originally built in 1913 as a rice husking facility, this large red brick structure was transformed by fascists in the Second World War into a concentration camp. The Nazis supposedly executed thousands here (although reported actual numbers vary), and shipped many more off to Auschwitz. At the end of the war and it was closed by Yugoslav partisans liberating the city, and then served as a refugee camp for Italians fleeing Yugoslavia. The museum there now is reachable by taking bus 8 from the main train station.