As a first stop, look for the infamous Chungking Mansions at 36-44 Nathan Road where a crush of multiple ethnic groups are reputed to be involved in businesses of dubious distinctions. Amidst the buildings' blocks and alleys are residential flats, cheap short-stay rooms, colorful shops and restaurants. The frenetic energy of Chungking Mansions was introduced to Western viewers in Director Wong Kar-wai's film Chungking Express (1994).