Arrive this morning in Passau, at the confluence of the Inn, Ilz and Danube Rivers. Your guided walk along the town’s narrow streets takes you through Old Town and past traditional patrician houses. You’ll see the New Bishop’s Residence and visit the impressive baroque St. Stephen’s Cathedral with its ornate interior. Inside, you are treated to a special concert played on the 17,000-pipe organ, considered Europe’s largest church organ.† Enjoy an onboard lunch, but return to the city to further explore on your own before dinner. (B, L, D)†Passau organ concert is only available May 1-October 31 and is closed on Sunday.