Kowloon Walled City
An interesting read on the now demolished Kowloon walled city in Hong Kong, which was largely self-regulated, isolated, and at one point the most densely populated area on earth.
"After world war 2, squatters moved in and the real growth began, both in numbers and building size. surrounded by discussion about the future of the walled city and half-hearted attempts by different groups to assume control, the people within the walls started to modify their homes, building upwards, interconnecting apartments, slowly shutting out sunlight to all but those on the outer-edges. the triads even took control of the city until 1974, finally driven out by 3,000 seperate police raids."