Frankfurt, a central German city on the river Main, is a major financial hub that's home to the European Central Bank. It's the birthplace of famed writer Johann Wolfgang von Goethe, whose former home is now the Goethe House Museum. Like much of the city, it was damaged during World War II and later rebuilt. The reconstructed Altstadt (Old Town) is the site of Römerberg, a square that hosts an annual Christmas market.

Koblenz, spelled Coblenz before 1926, is a German city on the banks of the Rhine and of the Moselle, a multi-nation tributary. Koblenz was established as a Roman military post by Drusus around 8 B.C. Its name originates from the Latin cōnfluentēs, meaning " confluence".

Mannheim is a city in southwest Germany, on the Rhine and Neckar rivers. The baroque 18th-century Mannheim Palace houses historical exhibits, plus the University of Mannheim. In the grid-like center, called the Quadrate, Marktplatz Square features a baroque fountain with statues. Planken shopping street leads southeast to the Romanesque Water Tower, in the art nouveau gardens of Friedrichsplatz.

Basel is a city on the Rhine River in northwest Switzerland, close to the country’s borders with France and Germany. Its medieval old town centers around Marktplatz, dominated by the 16th-century, red-sandstone Town Hall. Its 12th-century Gothic cathedral has city views, and contains the tomb of the 16th-century Dutch scholar, Erasmus. The city’s university houses some of Erasmus’ works.

Breisach is a town with approximately 16,500 inhabitants, situated along the Rhine in the Rhine Valley, in the district Breisgau-Hochschwarzwald, Baden-Württemberg, Germany, about halfway between Freiburg and Colmar — 20 kilometres away from each — and about 60 kilometres north of Basel near the Kaiserstuhl.

Speyer is a city in Rhineland-Palatinate in Germany with approximately 50,000 inhabitants. Located on the left bank of the river Rhine, Speyer lies 25 km south of Ludwigshafen and Mannheim, and 21 km south-west of Heidelberg. Founded by the Romans, it is one of Germany's oldest cities.

Frankfurt, a central German city on the river Main, is a major financial hub that's home to the European Central Bank. It's the birthplace of famed writer Johann Wolfgang von Goethe, whose former home is now the Goethe House Museum. Like much of the city, it was damaged during World War II and later rebuilt. The reconstructed Altstadt (Old Town) is the site of Römerberg, a square that hosts an annual Christmas market.