Here are a few suggestions for your next trip from Rudolstadt(Thür)

In 3 hours, you can reach Dresden, Nürnberg.

In 4 hours, you can reach Berlin, Munich, Frankfurt am Main.

In 5 hours, you can reach Stuttgart, Ústí nad Labem, Bremen.

In 6 hours, you can reach Prague, Hamburg, Linz, Pilsen, Köln, Liberec, Szczecin, Düsseldorf, Strasbourg, Salzburg...

In 7 hours, you can reach Vienna, Brussels, Basel, Wrocław, Liège, Poznań, Anderlecht.