an area you haven't been to in a very, very, long time. you remember it one way, but by the time you get back the 'developers' have closed in, and though the 'lay of the land' is pretty much the same, new buildings/architecture (bizarrechitecture? (-urban dict.word!) have 'gone up' and you no longer recognize the place.
went back to pooptown after fifteen years and it had become a geographical chameleon!