Honestly, I would just be happy with an Asian-inspired world and French/Italian world as an expansion pack. It seems like the Sims team would do a Swiss winter resort pack as a standalone expansion (if the previous survey is any indication), and I would also be concerned if they tried to fit too many destinations into one expansion, watering down the gameplay depth. I love the creativity in this thread though, and am glad there are others dying for more travel destinations. :) If I can't travel in real life right now - just let me do it in Sims! :D
