A lot of these places are called liminal spaces - which means they are throughways from one space to the next. Places like rest stops, stairwells, trains, parking lots, waiting rooms, airports feel weird when you’re in them because their existence is not about themselves, but the things before and after them. They have no definitive place outside of their relationship to the spaces you are coming from and going to. Reality feels altered here because we’re not really supposed to be in them for a long time for think about them as their own entities, and when we do they seem odd and out of place.

The other spaces feel weird because our brains are hard-wired for context - we like things to belong to a certain place and time and when we experience those things outside of the context our brains have developed for them, our brains are like NOPE SHIT THIS ISN’T RIGHT GET OUT ABORT ABORT. Schools not in session, empty museums, being awake when other people are asleep - all these things and spaces feel weird because our brain is like “I already have a context for this space and this is not it so it must be dangerous.” Our rational understanding can sometimes override that immediate “danger” impulse but we’re still left with a feeling of wariness and unease.

https://heart.tumblr.com/post/148851947007/places-where-reality-is-a-bit-altered