Bamberg is a town in northern Bavaria, Germany, laid out over 7 hills where the Regnitz and Main rivers meet. Its old town preserves structures from the 11th to 19th centuries including the muraled Altes Rathaus (town hall), which occupies an island in the Regnitz reached by arched bridges. The Romanesque Bamberg Cathedral, begun in the 11th century, features 4 towers and numerous stone carvings.

Nuremberg is the largest city of the German federal state of Bavaria after its capital Munich, and its 518,370 inhabitants make it the 14th-largest city in Germany.

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.

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, its 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. Stephens Cathedral, featuring distinctive onion-domed towers and an organ with 17,974 pipes.

Linz is a city in Upper Austria, straddling the Danube River midway between Salzburg and Vienna. Baroque buildings, including Old Town Hall (Altes Rathaus) and the old cathedral or Alter Dom, ring Hauptplatz, the old town’s main square. The riverside Lentos Kunstmuseum Linz has a major modern art collection. Across the river, the striking Ars Electronica Center focuses on society, technology and life in the future.

Melk is an Austrian town on the River Danube, west of Vienna. It’s known for the 11th-century Melk Abbey, a vast monastery built high above the town. Gold statuary adorns its domed Abbey Church, and the huge library houses medieval manuscripts. The Marmorsaal is a baroque hall with a ceiling fresco and red marble walls. South of Melk, gardens surround Renaissance Schallaburg Castle, which hosts cultural exhibitions.

The Wachau Valley is an Austrian region near the Danube River, west of Vienna. It’s known for its rolling hills, vineyards and fortresses. Richard the Lionheart was imprisoned in the castle above the town of Dürnstein. Highlights of nearby Gottweig Abbey include its lavish baroque church and views across the valley. Melk Abbey is a vast monastery also with an opulent baroque church.

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.

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.