Danube River Cruise Through Germany, Austria and Hungary (PHOTOS)

Onion-domed churches, vineyards chiseled into hills, ancient castles and grand palaces: a river cruise on the Danube is a scenic affair. In August I joined Viking River Cruise's Romantic Danube trip from Nuremberg to Budapest. Along the way the boat stopped at historic riverside towns and cities, including Regensburg, Passau, Melk and Vienna.

Follow along in the slidehsow below to see what it's like to spend a week on the water cruising one of Europe's grandest rivers.