grand highlights of the danube (2028) passau to bucharest | 17 days become an expert on the danube river’s many wonders as you admire the swirling colors of passau’s famous confluence, pedal past the vineyard-lined banks of the wachau valley, and listen... ship: s.s. marlene countries: austria, bulgaria, croatia, germany, hungary, romania, serbia, slovakia river: danube from $8,299* per person based on double occupancy. *from price based on september 2, 2028 itinerary. available on a limited number of staterooms. single supplement applies. view itinerary dates & pricing