28. Remake an underpass into an art space—or a park. Los Angeles has hundreds of pedestrian underpasses originally built to help students get across busy streets. But most of the underpasses have been sealed off to discourage illegal activities. In the Cypress Park neighborhood, coffee shop owner Yancey Quinones fought to reopen a nearby tunnel and fill it with art. The monthly openings spill out into the streets, activating the entire block. Need more inspiration? We’ve rounded up 11 ugly urban underpasses now functioning as parks.
While I generally approve of using underused spaces, I'm not sure it's a good idea to attract extra people to an area with high noise and pollution from cars right overhead.