Kowloon Walled City Enclave, Kowloon, Hong Kong, China

A thorough government survey in 1987 gave a clearer picture: an estimated 33,000 people resided within the Walled City. Based on this survey, the Walled City had a population density of approximately 1,255,000/km2 (3,249,000/sq mi) in 1987. For comparison, Hong Kong as a whole (itself one of the most densely populated areas on earth) had a population density of about 6,700/km2 (17,000/sq mi) as of July 2009.
Culture
Contrary to what many outsiders believed, most residents of the Walled City behaved similarly to other Hong Kong natives. In response to difficult living conditions, the residents formed a tightly knit community, helping one another endure various hardships. Within families, wives often did housekeeping, while grandmothers cared for their grandchildren and other children from surrounding households. The City's rooftops were an important gathering place, especially for residents who lived on upper floors. Parents used them to relax, and children would play or do homework there after school.