Here are a few suggestions for your next trip from Rheinfelden(CH)

In 2 hours, you can reach Zürich, Basel, Bern, Winterthur, Luzern, Strasbourg, Biel/Bienne, Thun.

In 3 hours, you can reach Schaan, Vaduz, Triesen, Lausanne, Eschen, Mauren, Ruggell, Sankt Gallen, Gamprin, Schellenberg...

In 4 hours, you can reach Luxembourg, Paris, Esch-sur-Alzette, Genève, Dudelange, Lyon, Schifflange, Frankfurt am Main, Bettembourg, Stuttgart...