A FEW YEARS AGO, DETROIT’S Callahan Park was indistinguishable from an abandoned lot, its overgrown turf grass strewn with litter. While the city has been in economic recovery mode since its 2013 bankruptcy, some areas have rebounded more than others, and many of its more than 300 parks look much like Callahan once did.
Today, however, Callahan Park is blanketed in a lush meadow, with
