In 2 hours, you can reach Berlin, Hamburg.
In 3 hours, you can reach Bremen.
In 4 hours, you can reach Essen, Dortmund, Dresden.
In 5 hours, you can reach Köln, Poznań, Frankfurt am Main, Szczecin, Düsseldorf, Kolding, Ústí nad Labem, Enschede, Arnhem, Nürnberg.
In 6 hours, you can reach Amsterdam, Prague, Odense, Munich, Wrocław, Utrecht, Liberec, Liège, Esbjerg, Stuttgart...