Vienne is a commune in southeastern France, located 35 kilometres south of Lyon, at the confluence of the Gère river and the Rhône. Today, it is only the fourth largest city in the Isère department, of which it is a subprefecture, but was a major center of the Roman Empire.

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.

Dürnstein is a small town on the Danube river in the Krems-Land district, in the Austrian state of Lower Austria. It is one of the most-visited tourist destinations in the Wachau region and also a well-known wine growing area.

Bratislava, the capital of Slovakia, is set along the Danube River by the border with Austria and Hungary. It’s surrounded by vineyards and the Little Carpathian mountains, crisscrossed with forested hiking and cycling trails. The pedestrian-only, 18th-century old town is known for its lively bars and cafes. Perched atop a hill, the reconstructed Bratislava Castle overlooks old town and the Danube.

Kalocsa is a town in Bács-Kiskun county, Hungary. It lies 142 km south of Budapest. It is situated in a marshy but highly productive district, near the left bank of the Danube River. Historically it had greater political and economic importance than at present.

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.

Esztergom is a city in northern Hungary, 46 kilometres northwest of the capital Budapest. It lies in Komárom-Esztergom county, on the right bank of the river Danube, which forms the border with Slovakia there.

Vienne is a commune in southeastern France, located 35 kilometres south of Lyon, at the confluence of the Gère river and the Rhône. Today, it is only the fourth largest city in the Isère department, of which it is a subprefecture, but was a major center of the Roman Empire.

Vienne is a commune in southeastern France, located 35 kilometres south of Lyon, at the confluence of the Gère river and the Rhône. Today, it is only the fourth largest city in the Isère department, of which it is a subprefecture, but was a major center of the Roman Empire.