GRAND EUROPEAN DISCOVERY . . Travel along three majestic rivers—the legendary Rhine, the meandering Main, and the enchanting Danube—and be inspired at every turn. Encounter some of the prettiest towns in Europe—Strasbourg, Heidelberg, and Bamberg—and tour Austria’s imperial capital, Vienna. Explore legendary landmarks, including Melk Abbey and the Würzburg Residenz. Tradition, history, art, and a host of irresistible flavors are yours to discover on one grand journey.