Spot the Marolles flea market
Walk to Place du Jeu de Balle (the daily Marolles flea market). Photograph a row of stalls with old crockery, vinyl and bric-à-brac.
Spot the Sablon antique stalls
Walk to the Place du Grand Sablon and find the antique stalls (weekends) or the chocolate-shop windows. Photograph a stall or a shop facade.
Spot the Town Hall spire
Find the spire of the Hôtel de Ville on the Grand Place, with the statue of Archangel Michael on top. Photograph the spire reaching for the sky.
Spot Tintin on a wall
Find a Tintin mural or wall (Rue de l'Étuve has the most famous one). Brussels has dozens of comic murals on its Comic Book Walk. Photograph one.