Nice place for a day out. Enjoy a leisurely drive through the countryside and arrive at the castle. Most interesting is the nice French style garden, which is worth a good walk. The initial garden must have been really huge but even the remaining part is worth the visit. When going to visit Beloeil castle, it is always a good idea to have a picknick in the vicinity.
http://cheeseweb.eu/2012/06/chateau-de-beloeil-hainaut-belgium/