These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Invisible Cities
High Octane Nightmare Fuel: Although the book is more generally unsettling than anything, a few cities stand out. For example, the city which reflects the harmony of the universe... which is inhabited by monsters.