Here are a few suggestions for your next trip from Nienburg(Weser)

In 2 hours, you can reach Hamburg, Bremen, Hannover, Bielefeld, Braunschweig, Etelsen, Hude, Porta Westfalica, Bremen-Sebaldsbrück, Helmstedt...

In 3 hours, you can reach Magdeburg, Kassel-Wilhelmshöhe, Marienhafe, Emden Außenhafen, Berlin-Spandau, Emden Hbf, Köthen, Norden, Brandenburg Hbf.

In 4 hours, you can reach Berlin, Halle (Saale), Bitterfeld, Leipzig/Halle Flughafen, Dessau Hbf, Norddeich Mole, Berlin-Lichtenberg, Norddeich, Potsdam Hbf, Berlin-Wannsee.

In 5 hours, you can reach Frankfurt am Main, Leipzig, Würzburg Hbf, Leipzig Messe, Hanau Hbf, Königs Wusterhausen, Lübben(Spreewald), Lübbenau(Spreewald), Darmstadt Hbf.

In 6 hours, you can reach Mannheim, Cottbus Hbf, Heidelberg Hbf.

In 7 hours, you can reach Karlsruhe, Ludwigsburg, Offenburg.

In 8 hours, you can reach Freiburg, Berlin Zoologischer Garten (S), Berlin Savignyplatz, Berlin Zoologischer Garten.

In 9 hours, you can reach Basel.

In 10+ hours, you can reach Zürich, Schaffhausen, Singen(Hohentwiel).