Fans of Hong Kong crime thrillers should make a trip to this museum in pretty Wan Chai Gap. The protagonist in this former police station is the Hong Kong police force, formed in 1844, but the real star is the Triads (ie Hong Kong Mafia). The eye-opening Triad Societies Gallery uncovers the rituals they follow. Equally intriguing is the well-supplied Narcotics Gallery . If taking the bus, alight at the stop between Stubbs Rd and Peak Rd.