Here are a few suggestions for your next trip from Fachingen(Lahn)

In 2 hours, you can reach Köln, Frankfurt am Main.

In 3 hours, you can reach Stuttgart, Düsseldorf, Essen, Dortmund.

In 4 hours, you can reach Luxembourg, Brussels, Liège, Anderlecht, Strasbourg, Schaerbeek, Merl, Leuven, Strassen, Molenbeek-Saint-Jean...

In 5 hours, you can reach Amsterdam, Antwerpen, Esch-sur-Alzette, Gent, Basel, Munich, Dudelange, Schifflange, Utrecht.