I encountered a picture of the walled city of Kowloon in Hong Kong. Before I knew it I was watching this documentary about it.
I don't know exactly why, but this is by far the most sci-fi thing I've seen recently:
https://www.youtube.com/watch?v=S-rj8m7Ssow
@kingannoy parts of Hong Kong still had a very claustrophobic feel, although most of the city seemed very polished.