Beijing Police Museum 北京警察博物馆

Start at the fourth floor, where you get to shoot laser pistols at moving targets, and work your way down through a collection of over 8,000 police tools and weapons from the Han Dynasty through to the present. The exhibit on fingerprint forensics is a highlight, as is the gruesome second-floor display of old-fashioned torture devices and photos (families with kids would be advised to skip it). On the first floor there's an exhibit detailing the police force's origins and history - don't miss the section on Kuomintang reactionary agents and the signed, fingerprinted confessions from failed "subversion schemes."