Travels down the Danube River from its source in Donaueschingen, Budapest, highlighting the gorges, countryside, and towns and cities along its banks. Visits Ulm, Ingolstadt, Mein Danube canal, Regensburg, Passau, Wachau Valley, Melk, and Vienna. Explores the gothic and medieval architecture of this region and visits the many castles, cathedrals,monasteries that reveal the history and culture of Hungary and Austria.