On the background of urban commoning, and in collaboration with the European Commons Assembly, we want to do a city tour to discover some of the most emblematic spaces of sharing economy and social experiences in Madrid. From La Ingobernable to Campo de la Cebada, we want to establish dialogue between many of these experiences with the intention of exchanging knowledge with the community of Transeuropa.  The objective of this walking around the city is to think together about possible ways of visualising the transformations of the European cities from and with the collaborative practices that are producing these changes.