Here are a few suggestions for your next trip from Berlin Hbf (S-Bahn)

In 2 hours, you can reach Berlin, Hamburg, Dresden.

In 3 hours, you can reach Szczecin, Ústí nad Labem, Bremen, Nürnberg.

In 4 hours, you can reach Prague, Frankfurt am Main, Poznań, Liberec, Essen, Dortmund, Most.

In 5 hours, you can reach Munich, Köln, Wrocław, Stuttgart, Düsseldorf, Kolding, Bydgoszcz, Pardubice, Enschede, Arnhem.

In 6 hours, you can reach Amsterdam, Warsaw, Łódź, Odense, Utrecht, Pilsen.