The scenic Danube River runs through 10 European nations, including Bulgaria. This majestic river stretches 1,780 miles. River cruises of the Danube typically feature stops in some vibrant and beautiful cities, including Cologne and Bucharest. If you're looking for a family holiday idea, you may want to take the kids along on a Danube river cruise. Once you discover the pros and cons of Danube river cruises, you'll be ready to decide if this typ...