Passau, Germany

Founded by the Celts more than 2,000 years ago, Passau is one of Bavaria's oldest cities. Known as the "City of Three Rivers," it rests at the confluence of the Inn, Ilz and Danube Rivers. The city has long enjoyed its strategic position and grew to great economic and political power because of it. The legacy of its past prosperity lives on in graceful arcades, colorful houses with rococo facades and the glorious baroque St. Stephen's Cathedral, home to one of Europe's largest pipe organs. Passau is also where two nations meet; it is here that the German-Austrian border begins.