“Filling Up” is the first of two themes presented here. The leftover spaces created by the continual development of the city are examined as vital, attractive voids to be integrated into the urban dynamic, though perhaps not always in terms of recreational functions. A text by Aldo Vanini introduces several projects, such as the Tel Aviv Port Public Space Regeneration and the Schinkel Islands Park in Amsterdam. The second theme, “Delimiting”, investigates a redefinition of the concept of the urban square in newly built towns and urban areas. With an essay by Diego Terna, the projects include Music Park in Seville and the Dover Esplanade, among several others.