Three consecutive medieval courtyards accessible through Cour du Commerce — the most private square metres in Saint-Germain, unknown even to many locals
The oldest covered passage still open in Paris (1800) — stamp dealers, old-school brasseries, and a warren of side galleries that goes on longer than expected
Directly across the boulevard from Passage des Panoramas — the Musée Grévin wax museum is hidden inside, along with a toyshop and a cane-and-umbrella specialist
A cobblestoned carriage passage off the Faubourg Saint-Antoine, steps from Bastille — ateliers, quiet studios, and zero foot traffic despite its location
A hidden network of interconnected courtyards in the Marais filled with antique dealers — enter from Rue Saint-Paul and emerge somewhere completely different
A medieval alley where Marat had his printing press and the guillotine was first tested on sheep — café tables now, but the stones go back to the 13th century