First, we have a city with the same density of New Orleans, followed by Austin, Chicago, Singapore, Manhattan, Manila, the Dharavi slum, and finally the Kowloon Walled City.
In 1994, Kowloon Walled City was finally demolished, and what was once a chaotic, pulsating hive of human life has been replaced with a peaceful Chinese garden.
And when the Hong Kong government released plans to demolish the city, they organized the the Kowloon City and Demolition Committee that fought against the plan for years.
Hong Kong's average price for a square foot of office space is around 30% higher than London’s West End at second place, followed by Beijing’s Finance Street, Hong Kong’s Kowloon and Beijing’s Central Business District.
But during World War II, Japan had taken over swaths of China, including Hong Kong, and when they needed building materials to expand the nearby airport, they just took the walls of Kowloon Walled City.