Why: Both of these popular Southern Hemisphere locales are famous for their outdoor sports. At many major ports, you can find your way into surfing, Jet Skiing, windsurfing, wakeboarding, parasailing or even (gulp) bungee jumping. In Australia, the Great Barrier Reef, despite the ecological challenges it faces, remains one of the best places in the world for diving and snorkeling, while New Zealand's Lord of the Rings-esque landscapes beckon with diversions in the great outdoors.