The Beautiful S.S. Maria Theresa is described as a floating castle taking you back in time as you sail the Danube. Beautiful Ship, Delicious Meals, and Amazing Ports of Call with Experienced Guides sharing the their extensive knowledge and history of the area, cities and towns on every Shore Excursion. We sailed from Passau (Germany) to Budapest (Hungary) visiting, Linz, Salzburg, Melk, Durnstein, Vienna (Austria), and Bratislava (Slovakia).