Sitting at place Sainte Catherine is well recommended when you have time to spare. This large lane with banks surrounding fountains starting at the fish restaurants and continuing up to a green patch with trees.
All sorts of unusual things happen around this place. Next to touristic fish restaurants there is an ice cream vendor, an African restaurant and several night shops. The statues round the fountain picture fish and several reptiles.
You can sit there for hours talking, watching and enjoying the changing city scenery. The place is a welcome change from the rest of the noisy areas in the center. This is a nice place to visit when you want to just sit down, enjoy a long conversation, watch the people passing by or getting to know large groups of friends.
You can also find some good fish restaurants there. Spend some time in this area to get acquainted with Brussels calm life.