Antarctica. To see auroras and penguins.
Whenever I meet someone new, I always get a huge craving to go where they are from. So, right now I'd really like to go to Scotland and the south of France... but with no money or time limitations I would definitely extend that to the rest of the UK, Ireland, Spain, Italy, Greece... I could go on forever.
And I'm already on a dream long-term "vacation" in Australia!
I would go to Chicago or Lousiana