Local traditions and language, Düsseldorf
The cartwheel turner is the symbole of Düsseldorf. You will often find monuments or pieces of art showing cartwheel turners, and ones in a while kids will turn cartwheels on the streets to earn money.
In the picture you can see the 'Radschlägerbrunnen' (fountain of the cartwheel turners) on the Burgplatz in the Altstadt.
Fondest memory: In high German this would be: "Eine Bitte! Parkt hier nicht - das tät uns schaden, denn Ürige-Bier wird hier verladen. Dank euch! Das Ürige" and in English simply: "One favor! Don't park here, it would desturb us, cause Ürige-beer is being silt up here. Thank you! The Ürige"