Also known as the city of darkness: http://cityofdarkness.co.uk/

William Gibson visited the city and described it in his 1997 work, Idoru:

"There was a place near an airport, Kowloon, when Hong Kong wasn't China, but there had been a mistake, a long time ago, and that place, very small, many people, it still belonged to China. So there was no law there. An outlaw place. And more and more people crowded in; they built it up, higher. No rules, just building, just people living. Police wouldn't go there. Drugs and whores and gambling. But people living, too. Factories, restaurants. A city. No laws."