Mexico City sits on a valley, home to a rich network of lakes, wetlands and rivers. This complex ecology is almost extinct due to a relentless urban development which threats the viability of Mexico City while denying its inhabitants access to an inherently per-formative landscape. The project proposes the recovery of the ravines, the last and primal bastions of the water ecosystem which nowadays co-exist with the city. Through a multi-scalar approach, it fosters local and punctual interventions with metropolitan implications. It ensures the re-integration of ravines into the urban fabric through the engagement and interlocking of responsibilities from various agencies, communities and neighbours.