Liminal spaces

 Seeing all the ads for the Backrooms movie made me go back and watch some of the youtube videos again. It reminded me of some experiences and old stories about uncanny constructed spaces that had an impact on me when I was young.
I saw a thumbnail image of a Piranesi print, and went to find all his dungeons
People go in spaces that are subtly wrong, like having 4 kitchens in one house, or having been molded instead of constructed:
https://archive.org/details/1959-07_IF/page/48/mode/2up
A man gets on a down escalator, and it just keeps going down:
https://lexal.net/scifi/scifiction/classics/classics_archive/disch/disch1.html

The army builds artificial villages for training soldiers. They are completely abandoned, occasionally having fake furniture or fake food. We were testing robots there so occasionally you would come across some non-human entity with glowing lights wandering about.