I will be spending a couple of days in Brussels. I would like to go to France and I would like to go by train.
I tried to find that looking at the train line map, and at the belgium train website, but once you need to cross the border everything becomes very blurry and hard to search.
I should add that I am not interested in visiting Paris. Ironically it might actually be among the easiest and fastest with the thalys, but I would like a city across the border.
By easy I mean well connected (I don't want a place with one train a day) I don't mind if it's a slow train but should be doable for a day trip.
Which is the easiest French city to get by train from Brussels?