Here are a few suggestions for your next trip from Alken(B)

In 2 hours, you can reach Leuven, Brussels, Antwerpen, Gent, Liège, Anderlecht, Schaerbeek, Molenbeek-Saint-Jean, Ixelles, Uccle.

In 3 hours, you can reach Paris, Rotterdam, Köln, Charleroi, Brugge, Breda, Namur, Lille, Mons.

In 4 hours, you can reach Amsterdam, London, The Hague, Utrecht, Frankfurt am Main, Eindhoven, Tilburg, Düsseldorf, Diekirch, Ettelbruck...