Click to zoom in on this gorgeous visualization of Kowloon’s Walled City, demolished twenty years ago this month. The illustration is from an article from the South China Morning Post, which includes a short history of the place and more stories from people who used to live there:

It was once thought to be the most densely populated place on earth, with 35,000 people crammed into a few tiny apartment blocks and more than 300 interconnected high-rise buildings, all constructed without contributions from a single architect.