Racoon city, Matrix, LV-426, Mario island, Nublar, Hogwarts, Irontown, Far Far Away, Gotham...
I've always wondered what the large-scale map of the Dune universe looks like, at the planet and system level. Although it really doesn't matter, with the Spacing Guild and it's navigators. Space becomes somewhat meaningless when you can bend it.
It's not really clear exactly how folding space works, though. Later in the series, no-ships are used and one of the reasons they can be used is because they can calculate how to avoid interstellar objects just as the Guild Navigators do (which I believe is not mentioned until the moment the no-ships are actually introduced).
So even with foldspace, actual positions may be useful, although I don't think these are discussed much in the novels, so I supposed there's no real basis for a map.
Which speaks to the GGP's comment about many more things being considered fantasy. City 17 exists on an alternate Earth and there are countless alternate Earths in fiction. The first two that come to my mind are the Fallout universe and Philip K. Dick's Nazi- and Japanese-occupied United States.