This is only tangentially related, but I wonder if other people have noticed the phenomenological changes that happen as you become familiar with a city. When

This is only tangentially related, but I wonder if other people have noticed the phenomenological changes that happen as you become familiar with a city. When I come to a new city everything seems "flat," for want of a better word. The four directions at an intersection all have the same weight and pull and elevation. Once I get to know a city, my brain starts to introduce a sense of "upwardness" and "downwardness." Usually this is simply the cardinal directions, but not always, and in any case it rarely relates to actual changes in elevation. Once I know a city well, it's impossible to get the sense of "flatness" again, except for rare occasions when I come out of a subway stop and I'm disoriented, and then it can feel like a new city again.