After breakfast, arrive in picturesque Passau, Germany where the Inn and Ilz Rivers join the Danube. Your city tour takes you on an exploration of this fairy tale locale founded more than 2,000 years ago. Walk the cobblestone streets of Old Town where you’ll see the ancient fortifications and St. Stephen’s Cathedral, home to the largest cathedral organ in the world. Or, substitute the Passau city tour with an optional excursion to Salzburg, birthplace of Wolfgang Amadeus Mozart and the setting for “The Sound of Music.” For those staying on board, enjoy a scenic cruise from Passau into Austria and on to Linz. After dinner, take a walk through this delightful town, Austria's third largest city and a major river port. Meals B,L,D