This is the Promenade plantée an elevated park built on a disused railway track in the 12th arrondissement of Paris. At ground level the spaces between the arches that held the railway line have been converted into shops and workshops and is known as the Viaduct des Arts.
A railway line carried passengers along this route from 1859 until the 1970s until it was replaced by new suburban routes. For some time afterwards there was a debate as to whether to tear down the viaduct or to put it to some use. Fortunately, the walkway proposal won the debate and the promenade plantée was opened in 1994.
It’s and enjoyable walk along a 4.5 kilometre route stretching from Bastille, just behind the opera to the Bois de Vincences.
Its makes for an interesting stroll both in the park on top of the arches or on the street below. At street level you can explore the arches which hold a number of workshops, and shops related to arts, crafts and textiles as well as some cafes and restaurants. To join the promenade plantée clim the stairways next to the archways at various points along the route along Avenue Daumesnil which runs parallel. From up above you can either enjoy the tree lined route or peer down at life on the streets below.