A riverboat trip from Cologne offers the best vantage point for viewing the Rhine Valley. The Middle Rhine, between Rudesheim and Koblenz, is a UNESCO World Cultural Heritage Site, with more than 20 medieval castles, picturesque villages, vineyards and the famous Loreley Rock. Boat trips range from one-hour city sightseeing cruises to full-day round trips, and tours are available year-round, with reduced schedules in wintertime.
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