Harnessing the creativity of a megalopolis isn't easy, but Mexico City shows us how it's done. Follow a real-life superhero who dons a luchador mask and cape to protect his fellow residents from speeding cars, learn how citizens are hacking their way to a better public transport system, and see what it takes to crowd-source a constitution from a city with 21 million minds. This is an episode from another podcast from the TED Audio Collective. Get more Far Flung wherever you get your podcasts.