5. New New York
New New York: Curiously different, but somehow almost the same. The people are just as weird (also some of them are lobster aliens now), and it probably still smells awful.
As if the cripplingly corrupt police force and seemingly endless onslaught of villains hellbent on the city's downfall weren't enough, there's some angry guy dressed in body armour running around, ready to beat the shit out of you the MOMENT you step a toe out of line? Awesome.
3. A Galaxy Far Far Away
Eh, it was great the first time, but should never have been revisited.
Outside of a few hiccups, most of Middle Earth seems to live a pretty comfortable life. It's a good thing those hiccups are so interesting/visually dazzling, though. Nothing worse than a boring war.
By a country mile, the absolute best fictional location ever is Hogwarts School of Witchcraft and Wizardry. It's a testament to the quality of the teaching, the beauty of the architecture, and the strength of the friendships within those hallowed halls, that people seem willing to brave the virtually countless, monstrously evil things that happen there every year. Still, as long as Gryffindor wins the Quidditch cup, that's fine by me.