The proposal for the Eco-boulevard of Vallecas can be defined as an operation of urban recycling that consists of the following actuations: the installation of three social revitalizing air trees placed along the existing urbanization, the densification of trees within their existing concourse, the reduction and asymmetric disposition of the traffic routes, and superficial interventions within the existing urbanization (perforations, backfill, paint, etc.) that achieve reconfiguration of the executed urban development. Three pavilions or air trees function like open structures to multiply resident-selected activities. Installed in the non-city as temporary prostheses, they will be used only until air-conditioned spaces are no longer needed, when the area becomes “fixed”. When a sufficient amount of time has passed, these devices should be dismantled, leaving remaining spaces that resemble forest clearings. The air tree is a light structure, easily dismantled and energetically self-sufficient, that only consumes what it is capable of producing by means of systems designed to capture and use solar photovoltaic energy.