Venice - I would love to go on a Gondola ride through Venice. Soaking up the rich history and architecture of the beautiful buildings. Then spend my evenings enjoying the rich tastes of wine and food in Italy.
Venice. I went here twice, once around age 11-ish, once at around 16. It really stands out in my my memory because it's just such an interesting and one-of-a-kind place. I wish so often that Nick and I could drop life's obligations and constraints and do stuff like wander around and soak up Venice whenever we wanted (and a laundry list of other places, too, but Venice is high on the list).