Vacationed in April on the Viking Kara river cruise line down the Rhine River from Amsterdam, Netherlands to Basel, Switzerland. We had a wonderful time, eating the cuisine of the areas and drinking beer and wine of course. The river boat and it's crew were real personable and a blast to be around. Took at least one and most days two excursions at each port. Visited Kinderdijk and it's windmills, scenic cruise along the Waal and Merwede rivers which are fed by the Rhine river, visited the Cologne Catherdal in Cologne Germany, toured the Marksburg castle in Koblenz Germany, loved all the scenery including castles on either side od the Rhine