One of the city's best-kept secrets is this superb museum housed within a former Victorian police station. The original building has been magnificently – if a little creepily – brought back to life, and you can wander in and out of 19th-century cells where prisoners rested their heads on wooden pillows; visit a restored magistrates' court from 1895 and examine the case histories (complete with mugshots and photos of weapons) of some of the more notorious names to have passed through its doors.