In Passau, you can witness the remarkable confluence of three rivers: the Danube, Inn, and Ilz. This intersection creates a stunning natural spectacle at the city's northernmost point. While exploring Passau, don't miss St. Stephen's Cathedral, home to the world's largest cathedral organ with 17,974 pipes! It even hosts regular concerts. Then head to Salzburg for even more music at Mozart's birthplace. Its historic center dazzles visitors with the Salzburg Cathedral and Mirabell Palace with its geometrically arranged gardens. Salzburg offers not only musical heritage but also the imposing Hohensalzburg Fortress that looks dramatically over the city, providing breathtaking views of the Austrian Alps.