A nineteenth century railway viaduct was transformed into an elevated greenway through the 12th Arrondissement. The arcades beneath became arts and crafts workshops. The design was by Jacques Vergely (landscape architect) and Philippe Mathieux (architect). Pedestrians have a garden environment for their high-level walk and cyclists have a route at ground level. Then, 4.5 kms from the start, the routes come together at ground level and proceed to the Bois de Vincennes. The high-level route has some enclosed sections, as when it passes between modern buildings, and some open sections with exhileratingly expansive views.