Why it matters: this non-profit, co-founded in 2014 by Julie De Muer, Loic Magnant, Baptiste Lanaspeze and Alexandre Field, is the collective of artist-walkers behind the GR2013 – a 365 km waymarked trail created for Marseille-Provence European Capital of Culture 2013 that loops through 38 towns and 3,000 sq km of the metropolis. It exists to make the whole territory walkable and legible to the people who live in it, not to sell scenery. The guided walks are led by the artists, ecologists and urbanists who mapped the route, and they deliberately take in motorway edges, industrial zones and ravines alongside the hills. Tip: the walks are the point – check the programme before you go, and expect the peri-urban rather than the postcard.
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Cite des Arts de la Rue, 225 avenue Ibrahim Ali, 13015 - non-profit walking-guide collective - walks by programme, book ahead