Four countries, three rivers, and the masterful Main Danube Canal are the basis of this delightful 14-day river cruise vacation. Start in Zürich, Switzerland, then enjoy guided sightseeing in the cities of Strasbourg, Würzburg, Nuremberg, and Vienna. There’s an excursion to Heidelberg with its imposing castle ruins, and a visit to the beautiful Benedictine Abbey of Melk. Guided walks of the smaller towns show you their highlights, and there’s a chance to sample some of Germany’s world-famous beers!