Budapest, Hungary’s capital, is bisected by the River Danube. Its 19th-century Chain Bridge connects the hilly Buda district with flat Pest. A funicular runs up Castle Hill to Buda’s Old Town, where the Budapest History Museum traces city life from Roman times onward. Trinity Square is home to 13th-century Matthias Church and the turrets of the Fishermen’s Bastion, which offer sweeping views.

Budapest, Hungary’s capital, is bisected by the River Danube. Its 19th-century Chain Bridge connects the hilly Buda district with flat Pest. A funicular runs up Castle Hill to Buda’s Old Town, where the Budapest History Museum traces city life from Roman times onward. Trinity Square is home to 13th-century Matthias Church and the turrets of the Fishermen’s Bastion, which offer sweeping views.

Vienna, Austria’s capital, lies in the country’s east on the Danube River. Its artistic and intellectual legacy was shaped by residents including Mozart, Beethoven and Sigmund Freud. The city is also known for its Imperial palaces, including Schönbrunn, the Habsburgs’ summer residence. In the MuseumsQuartier district, historic and contemporary buildings display works by Egon Schiele, Gustav Klimt and other artists.

Vienna, Austria’s capital, lies in the country’s east on the Danube River. Its artistic and intellectual legacy was shaped by residents including Mozart, Beethoven and Sigmund Freud. The city is also known for its Imperial palaces, including Schönbrunn, the Habsburgs’ summer residence. In the MuseumsQuartier district, historic and contemporary buildings display works by Egon Schiele, Gustav Klimt and other artists.

Krems an der Donau is a town of 23,992 inhabitants in Austria, in the federal state of Lower Austria. It is the fifth-largest city of Lower Austria and is approximately 70 kilometres west of Vienna. Krems is a city with its own statute, and therefore it is both a municipality and a district.

Passau, a German city on the Austrian border, lies at the confluence of the Danube, Inn and Ilz rivers. Known as the Three Rivers City, it's overlooked by the Veste Oberhaus, a 13th-century hilltop fortress housing a city museum and observation tower. The old town below is known for its baroque architecture, including St. Stephen's Cathedral, featuring distinctive onion-domed towers and an organ with 17,974 pipes.

Regensburg, a Bavarian city on the Danube River in southeast Germany, is known for its well-preserved medieval core. The 12th-century Stone Bridge, a 310m-long icon with 16 arches, crosses the river to the old town. The 13th-century Regensburg Cathedral, a twin-spired Gothic landmark, is home to the Regensburger Domspatzen choir. Walhalla, a Parthenon replica just east of the city, honors illustrious Germans.

Regensburg, a Bavarian city on the Danube River in southeast Germany, is known for its well-preserved medieval core. The 12th-century Stone Bridge, a 310m-long icon with 16 arches, crosses the river to the old town. The 13th-century Regensburg Cathedral, a twin-spired Gothic landmark, is home to the Regensburger Domspatzen choir. Walhalla, a Parthenon replica just east of the city, honors illustrious Germans.