A recovered green walk that joins, within Madrid, the districts of Barajas and San Blas. This old railway branch that had the purpose of transporting fuel to Barajas airport, is today an urban bike lane widely used by the residents of these neighborhoods of the city of Madrid and the result of a neighborhood action that worked for the defense and recovery of this route for the improvement of the quality of life and mobility. The road environment has a large landscaped green zone and wooded with squares, children and older games, walks .. and some surprise, such as the tunnel decorated with attractive murals.