..in no particular order.
1) Australia- Sydney and Great Barrier Reef Dives
2) Portillo Chille (Skiing the Andes)
3) Hawaii (diving, seeing all the islands, Volcano, water falls)
4) Iceland (National Geographic has adventure packages that are way cool)
5) Italy- I would really like to go see some of the major cities and where my family was once from.
BUt if I had unlimited funds/ time, I would sign up with National Geographic for a world tour.
http://www.nationalgeographicexpeditions.com/486.html