Un nid d'amour : parfait pour des amoureux!
The closest is 'tour & taxis', check out the map, it's like I'm actually leaving there! If you don't want to go for an exhibition, a spa treatment or just a nice drink on a terrasse, at least just go to check the place out, it's so worth it! http://www.tour-taxis.com/en/
Of course, the most famous place in Brussels is the 'grand place' which you should not miss! It's a 30mn walk max from my place you can reach it by using the public transports as well if it's too rainy! 3 minutes walk from the grand place, there is also the famous 'manneken pis' http://www.brussels.be/artdet.cfm?id=5757&
Then it all depends on your interests. Are you into museums & exhibitions? Are you interest to see the Atomium? Are you just coming for the famous belgian beers & fries? Well all of it is easily reachable using public transports and I can as well provide you some guidance! :)
Pour organiser un échange de maisons, vous devez devenir membre