Georgia flea markets are not messing around, and once you experience one, weekends will never look the same. Smiley’s Flea Market in Macon earns its reputation as one of the largest flea markets in the entire state. Peachtree Peddler’s Flea Market and Antique Centre combines a massive indoor antique mall with a sprawling outdoor flea market. Atlanta Flea Market Metro Mart USA, AtlantaUrban energy hits you the moment you walk through the doors here. The Atlanta Flea Market Metro Mart USA on the south side of Atlanta is a powerhouse of small businesses operating under one massive roof.