I've occasionally had a kind of recurring dream involving a library that's mostly very modern-looking and efficient, but appears to have a few cramped little garret rooms stuffed into odd corners purely for the purpose of having crampled little book/curio shops tucked away in them that belong in a forgotten corner of some really old town, or maybe the back end of Diagon Alley. I wander around this library accomplishing not much of anything, but apparently with some very definite purpose in mind if I could just figure out what it was.
( And now the Dark Side version... )