Antiques, bric-a-brac, useful items and perhaps the odd long-sought collector's item can be found at the stalls along the banks of the Rhine in Mainz between Kaisertor and Theodor-Heuss-Brücke, which are run exclusively by private individuals. This is what makes the Mainz flea market so special. At the flea market for children, the youngsters sell whatever their hearts can spare without paying a stall fee.