In 2 hours, you can reach Charleroi, Namur, Mons.
In 3 hours, you can reach Brussels, Liège, Anderlecht, Schaerbeek, Leuven, Molenbeek-Saint-Jean, Ixelles, Uccle.
In 4 hours, you can reach Paris, Rotterdam, Antwerpen, Gent, Brugge, Lille.
In 5 hours, you can reach London, Amsterdam, Luxembourg, The Hague, Utrecht, Köln, Bettembourg, Tilburg, Düsseldorf, Merl...