Why This Eastern European River Cruise Should Be on Your 2026 Travel List If you’ve cruised the Danube through Vienna and Budapest, you’ve seen the classics—but what if your next journey took you deeper? Picture this: cruising past rugged cliffs carved by the Danube through Serbia’s Iron Gates Gorge , sipping wine in ancient Croatian cellars, standing in front of a legendary Transylvanian castle , and starting your journey in Bucharest and Transylvania before sailing the Dan