Architectural Cross-Section of Kowloon Walled City

At one time the most densely populated spot in the world, Kowloon Walled City was demolished in 1993-94, and is now a park. A Japanese research team documented the construction of the enclave shortly before demolition, after residents were evicted. They constructed an architectural cross-section of the buildings, illustrated as if people were still living there. 

Illustration by Hitomi Terasawa (寺澤 一美), from Kowloon City: An Illustrated Guide (大図解九龍城) (1997), by the Kowloon City Exploration Team, supervised by Hiroaki Kani (可児 弘明).

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via Neatorama