Here are a few suggestions for your next trip from Herzberg(Elster)

In 2 hours, you can reach Berlin, Dresden.

In 3 hours, you can reach Ústí nad Labem.

In 4 hours, you can reach Prague, Hamburg, Liberec, Szczecin, Most, Nürnberg.

In 5 hours, you can reach Munich, Wrocław, Poznań, Frankfurt am Main, Pardubice, Bremen, Kladno.

In 6 hours, you can reach Pilsen, Köln, Stuttgart, Düsseldorf, České Budějovice, Hradec Králové, Bydgoszcz, Essen, Dortmund, Enschede.

In 7 hours, you can reach Warsaw, Brno, Ostrava, Utrecht.