Here are a few suggestions for your next trip from Hennigsdorf(b Berlin)

In 2 hours, you can reach Berlin, Berlin Julius-Leber-Brücke, Berlin-Schöneberg, Berlin-Lichtenberg, Berlin-Lichtenberg (S), Berlin-Frohnau, Hohen Neuendorf(b Berlin), Bergfelde(b Berlin), Berlin-Waidmannslust, Berlin-Hermsdorf...

In 3 hours, you can reach Netzeband, Dossow(Prign), Fretzdorf, Wittenberge, Walsleben, Groß Pankow, Kunersdorf, Raddusch, Berlin-Rummelsburg, Kolkwitz...

In 7 hours, you can reach Oranienburg.