The Old Montana State Prison in Deer Lodge, operated from 1871 to 1979 and now serves as a museum complex featuring five museums, including areas noted for historical, violent riots. The site, which offers interactive ghost tours and investigations into areas like the 1912 Cell Block and "The Black Box," is open to the public and offers night tours on select dates. For booking and visitor information, visit the Old Montana Prison Complex website . Old Montana Prison Complex - Deer Lodge - Facebook