After the Kassel Marathon: Frankfurt
The Route: Kassel-Wilhelmshöhe → Frankfurt am Main Hauptbahnhof Logistics: A single direct high-speed train, no changes required, one of the simplest connections on this whole list of excursions. Marathon Month: September Duration: 2 nights
Kassel-Wilhelmshöhe ──(direct ICE, ~1.5 hrs)──> Frankfurt am Main
Frankfurt makes an unusually convenient onward stop after Kassel: a single direct ICE service covers the distance in around 90 minutes, and the city itself offers both a genuine change of pace, glass towers standing directly over a carefully rebuilt medieval old town, and one of Europe's best-connected international airports for the flight home. Two nights is enough to see the highlights properly without feeling rushed.
September in Frankfurt sits at the tail end of the city's outdoor café season, with the Main riverbanks still busy on mild afternoons and comfortable temperatures for walking the old town and the river paths.
Nights One and Two: The old town and the Main
Römerberg, the reconstructed medieval square at the heart of the old town, anchors most first visits: its half-timbered facades were rebuilt after wartime destruction, but the effect is convincing enough that most visitors don't clock the difference without being told. The nearby Frankfurt Cathedral (Kaiserdom) and the Historisches Museum both sit within a few minutes' walk, level ground throughout.
The Museumsufer, a run of museums along the southern bank of the Main, includes the Städel Museum, one of Germany's most significant art collections, in a building with flat, easy-to-navigate galleries. Crossing the river on the Eiserner Steg, a pedestrian iron bridge, gives a clean view back over the old town skyline against the modern financial district's towers, an easy, flat walk that works well as low-key evening activity.
For a wider view without stairs, the Main Tower's observation deck is reached by lift, giving a genuine 360-degree look across the city and, on a clear day, out toward the Taunus hills.
Where to stay: the Steigenberger Frankfurter Hof, a grand historic hotel near the old town, suits a proper two-night stay. The more modern Innside by Meliá Frankfurt Eurotheum, close to the Main and the financial district, offers a solid alternative with river views from upper floors.
Where to eat: a traditional Frankfurter apple-wine tavern in Sachsenhausen, on the river's southern bank, serves Handkäs mit Musik (a regional cheese dish) and Grüne Soße (a green herb sauce specific to the Frankfurt area) alongside the local apple wine, a properly regional dinner to close out the trip.
Getting Home
Frankfurt Airport (FRA) is directly connected to the city by S-Bahn in around 15 minutes, and as one of Europe's largest hubs offers by far the widest choice of international flights of any excursion on this list.