History takes center stage in Berlin and the cities you'll visit on a weeklong Danube River cruise – Regensburg, Passau, Vienna, Budapest and more.   Your Danube cruise is preceded by three nights in Berlin, chronicling past political divides with a look back at Iron Curtain curfews, Jewish hardships and wartime woes – while cultural narratives in the museums on Museum Island showcase an evolution of art through the ages. After exploring and boarding your Tauck riverboat in Regensburg, one of Germany’s best-preserved medieval towns, set off on a 7-night cruise. You'll discover picturesque Bavarian towns like cobblestoned Straubing, dating back to 6,000 BC, where you'll take a walking tour or visit a BMW factory, and Passau, a quintessential Bavarian town at the confluence of three rivers. Crossing into Austria, stop at Linz for a walking tour or boat ride in the nearby Lake District; explore Krems and the Wachau Valley by bicycle. In grand Vienna, enjoy two full days of sightseeing choices and attend an evening at a private palace, and conclude your cruise in glorious Budapest, straddling  the Danube.