Book your 2023 Grand European Tour river cruise now, and take advantage of this terrific air offer! Indulge all your senses on a 15-day journey covering the best of Europe. Viking's iconic itinerary traces the Rhine, Main and Danube Rivers through the heart of Europe, from windmill-dotted Holland to Hungary's stunning landscapes, with engaging encounters at every bend. Visit Amsterdam & Kinderdijk in The Netherlands; Cologne, Koblenz, Miltenberg, Wurzburg, Bamberg, Nuremberg, Regensburg & Passau in Germany; plus stay overnight in both Vienna and Budapest! Admire Rhine Valley vistas from a 900-year-old castle; sample regional food and wine; and learn Vienna's enchanting waltz. But hurry, this offer is only good through Dec 2022!