Thinking of leaving Europe for an island vacation? Save yourself some airfare and visit Germany's Tropical Islands (€25/visit). Housed inside the world's largest free-standing hall, the Islands feature a water park, a tropical village, and more, with perfect weather year-round. Use the money you save on great food, drinks, and gear, found at the Islands' various on-site restaurants, bars, and shops, or simply relax at the spa. Island weather, atmosphere, and entertainment, without the headaches.