International audienceNatural spaces contribute to the urban quality of life: the idea is now assured. They provide numerous benefits to the users. Cities are aware and they use these spaces as seductive argument to attract new inhabitants. Their elected representatives also exploit them as electoral argument. Green spaces play a part in improving the image of cities, to make them attractive.In the framework of the research project SERVEUR, funded by the French region Centre-Val de Loire, we focused on cultural ecosystem services and the use of natural spaces in medium cities. In this article, we particularly question the attraction exerted by green spaces: what kind of urban nature city dweller wants? This nature comes in various forms, fr...