Discover the treasures of Europe's historic river system on this 10-night tour aboard the lavish Scenic Ruby. Embark from Amsterdam and flow through the heart of Europe to see Cologne's High Gothic architecture and the Cologne Cathedral. Visit majestic castles, including the famous Schloss Stolzenfels and the Rheinstein Castle. Experience the stirring cultures of Rüdesheim, Freudenberg, Würzburg, and Bamberg before concluding your trek in the colorful Czech Republic capital of Prague. Read more.