Surprisingly close rail network, very attractive rates, nice routes such as Liège - Luxembourg. Idyllic cities like Antwerp, Bruges, Ghent.
Travel quickly to Belgium by train from France, Germany, The Netherlands and the UK. The Thalys from Rotterdam is faster in Antwerp than in Amsterdam! Travel with the comfortable Thalys from Amsterdam, Schiphol and Rotterdam directly to Antwerp and Brussels and from there to other cities in Belgium, or take the Intercity from Amsterdam Central, Schiphol, The Hague HS and Rotterdam Central to Antwerp, Mechelen and Brussels. The Intercity takes much longer than the Thalys, but the train tickets for the InterCity are often much cheaper.
Super day return - If you travel up and down to Belgium in 1 day you can use a Super day return, these are very advantageous return tickets (not valid on the Thalys)
Weekend return - If you travel to Belgium after 09.00 on Friday and take the train back to the Netherlands for Sunday 11:59 pm, you can book the very advantageous weekend returns (not valid on the Thalys)