This fountain shows boys cartwheeling - a popular activity in the city since the 13th century. The city also holds a cartwheeling championship.
Wikipedia (German) http://de.wikipedia.org/wiki/Radschl%C3%A4gerbrunnen
Address 21 Burgplatz, Düsseldorf 40213, Germany
Coordinates 51°13'38.464" N 6°46'18.173" E