I'd go back to Pompeii. I've watched so many documentaries about Romans, and know quite a bit about it, but when I was there, I just couldn't imagine how these people lived there all these years ago. I've been to pretty awesome places (New York, British and French cliffs, Austrian mountains to name a few), but none have been so impressive as Pompeii.
Well yes. What do you expect? You'd have to be pretty weird or dishonest to choose some boring ass place in France over being in bed with attractive men/women.
Some remote mountain monastery in Nepal or Bhutan. Maybe a place like this: [spoiler:nfog8yxp][/spoiler:nfog8yxp]
I always thought it would be awesome to go to the international space station. Space kicks ass on so many levels, except for the part about it being inhospitable to humans.
I'm sure having to take a shit by strapping yourself to a vacuum machine, risking severe kidney damage and having no privacy is a lot of fun but I'm gonna stick to earth ^^