In the historic location of Les Halles on the popular pedestrian street rue Montorgueil lies Marché Saint-Eustache-Les-Halles (a mouthful, I know)! The market is not so big (there's usually around 20ish stalls) and it is only open on Thursday's and Sunday's. Like other markets there's a selection of fresh seasonal fruits and vegetables, wine sellers, French cheese, butchers etc... Even if you're not here for the food, it is worth coming for the location and taking a stroll around, or sitting down at a cafe and people watching.