Here are a few suggestions for your next trip from Köln-Stammheim

In 2 hours, you can reach Köln, Düsseldorf, Liège, Frankfurt am Main, Essen, Dortmund, Arnhem.

In 3 hours, you can reach Amsterdam, Brussels, Antwerpen, Utrecht, Anderlecht, Stuttgart, Eindhoven, Schaerbeek, Namur, Leuven...

In 4 hours, you can reach Paris, Luxembourg, Rotterdam, The Hague, Gent, Charleroi, Tilburg, Strasbourg, Almere Stad.