“I like to think of Park(ing) Day installations as the gateway drug for urban transformation,” says John Bela.

He’s one of the minds behind the urbanist holiday, held on the third Friday of September every year. Indeed, since 2005, when Bela and his collaborators installed the first Park(ing) intervention on a drab street in downtown San Francisco, the idea has gone on to enliven countless blocks around the world, and to enlighten countless urbanites, who get to enjoy spaces normally reserved for…