Originally built as a residential building, the complex now consists of several cheap hostels, three shopping malls, bistros, and restaurants. Although it is popular with backpackers, the complex is also infamous for being the center of drugs and illegal migrants' dwellings.
Wikipedia https://en.wikipedia.org/wiki/Chungking_Mansions
Official website http://www.chungking-mansions.hk/
Address 44 Nathan Rd, Tsim Sha Tsui, Hong Kong
Coordinates 22°17'46.471" N 114°10'22.445" E