Germany's chi-chi spa town has been a draw for the upper classes for centuries. They came for its thermal waters, its gardens and parks, and its glamorous casino. Untouched during both World Wars, Baden-Baden continues to attract monied Europeans for extended visits and second homes; it's one of the wealthiest cities in the country.
River cruise lines offer day trips to Baden-Baden on Rhine River itineraries, either as an included or optional excursion. The brave among the group will visit the city's spas, the most historic of which requires you to drop inhibitions and go nude (don't worry, it's all about health, and the experience is decidedly not salacious). Indulge your inner James Bond and dress up for the city's famous Casino, which is even prettier than the one in Monte Carlo. Stop for kaffee (coffee) and kuchen (cake); Baden-Baden is on the edge of the Black Forest, and you can order authentic Schwarzwalder kirschtorte (Black Forest cherry cake). Although there's a lot to see, this is a city built on relaxation -- and the vibe is catching.