This is a project designed with two goals: use of precast concrete and placing the crosswalk located on Piazza Galeno in Rome, largely used for traffic and train tracks, underground. To tie the lower level with the piazza, the existing tree trunks were extended in form of columns creating a field of verticals underneath. To allow in light and plant life, openings were made into the surface among the trunks, allowing the roots to cascade down into the cool and calm passage underground.