Known as Dreiflüssestadt (City of Three Rivers), Passau is the place where the Danube meets the Inn and the Ilz. The picturesque city lies in Germany’s far southeast corner near the Austrian border. Settled since prehistory and a former hub of the salt trade, it became the Roman village of Batavis, then later the Holy Roman Empire’s largest diocese and a sword-making center. Saint Stephan’s Cathedral, home of the world’s second-largest cathedral organ, is one of Passau’s favorite attractions.