3. The Paris Flea Market

Sifting through the cast-off treasures of a great city.

The Marché au Puces de Saint-Ouen, a Paris flea market, via Getty Image.

One of my favorite things to do on a weekend morning in Paris is to visit the flea markets located on the northern and southern edges of the city. I say markets, but I usually go to the one at the Porte de Vanves in the south. At these large professional markets, it is as if the deb…