Maybe not Hong Kong as a whole, but the Kowloon Walled City might fit the bill. Make's Rio's favelas look positively open and airy. https://en.wikipedia.org/wi

Maybe not Hong Kong as a whole, but the Kowloon Walled City might fit the bill. Make's Rio's favelas look positively open and airy. https://en.wikipedia.org/wiki/Kowloon_Walled_City https://en.wikipedia.org/wiki/Kowloon_Walled_City It was the most densely populated place in the world prior to being demolished and dubbed the "City of Darkness".