Have you taken a river cruise in Europe yet? The 'Big Three' river cruises are the Rhine, the Danube and the Rhone/Saone. You may have heard about cruising on the Seine, even Main and Moselle cruises.But for a little 'off the beaten track' river cruising in Europe, Portugal's Douro river is enjoying its day in the sun. Warm-weather Portugal, in the heart of...
