In the past 10 years I have visited many European cities and photographed their local street art scenes. I have uploaded many of these images on my Flickr account. Under the example photos below you can find a list of cities where the street art pictures were taken.
Belgium: Antwerp, Brussels, Charleroi, Doel, Ostend
France: Arles, Avignon, Marseille, Orléans, Paris, Saint-Quentin
Germany: Berlin, Hamburg
Italy: Palermo, Rome, Trapani, Catania, Noto, Ragusa, Agrigento
The Netherlands: Utrecht