The Viaduc des Arts is a series of 45 working studios for craft artists located between the arches of a restored 19th century viaduct running alongside Avenue Daumesnil. With restaurants and outdoor cafés to complement the artists' workshops, it has a strong appeal to visitors and tourists. The old rail bed on top of the viaduct has been replaced by the Promenade Plantée, a 2.5 mile greenway that extends from Place de la Bastille almost to the Bois de Vincennes on the eastern edge of the city. Much to our surprise, the walk along the Promenade, which is situated at the equivalent of a building's third floor, was quite pleasant, offering a spectacular view of the city's rooftops and a quiet stroll unimpeded by vehicular intersections.

http://www.pps.org/great_public_spaces/one?public_place_id=726