Here are a few suggestions for your next trip from Ründeroth

In 2 hours, you can reach Köln, Düsseldorf, Essen.

In 3 hours, you can reach Frankfurt am Main, Liège, Leuven, Dortmund, Arnhem.

In 4 hours, you can reach Brussels, Amsterdam, Antwerpen, Gent, Utrecht, Eindhoven, Anderlecht, Stuttgart, Schaerbeek, Tilburg...

In 5 hours, you can reach Luxembourg, Paris, Rotterdam, Hamburg, Basel, The Hague.