Travel through nine European countries to discover Old World capitals and charming villages along the mighty Danube River. Enjoy three nights in Prague, Czech Republic, sail the Danube for eight nights and complete your adventure with two nights in Sofia, Bulgaria. During this exciting journey, discover Roman ruins, castles, cathedrals, synagogues, mosques and fortresses — all part of the complex history of this region. Feast your eyes on gorgeous panoramas of Budapest illuminated at night, the lush Wachau Valley and the immense Iron Gate Gorge, and immerse yourself in authentic cultural experiences. Onboard, enjoy a Serbian folk show and a performance of the Viennese waltz. In several ports, choose from a selection of included excursions, featuring culinary outings, cycling, art tours and more. Enjoy first-class ship accommodations and deluxe hotels. The extensive meal plan features wine and beer with lunch and dinner. There is no single supplement for solo travelers.