Here are a few suggestions for your next trip from Mühlhausen(b Engen)

In 2 hours, you can reach Zürich, Basel, Winterthur, Sankt Gallen.

In 3 hours, you can reach Schaan, Vaduz, Triesen, Frankfurt am Main, Eschen, Bern, Stuttgart, Mauren, Luzern, Strasbourg...

In 4 hours, you can reach Köln, Lausanne, Lugano.

In 5 hours, you can reach Luxembourg, Paris, Esch-sur-Alzette, Genève, Dudelange, Munich, Schifflange.