The City of Cincinnati Park Board has five regional and 70 neighborhood parks and 34 nature preserves that are open from 6:00 a.m. until 10:00 p.m. Cincinnati Parks maintains parkways and neighborhood gateways in addition to managing Cincinnati's Street Tree program on 1,000 miles of City streets. The parks system operates five nature centers, an arboretum and one of the larger public plant conservatories in the country. Our public art collection is the Midwest’s largest. Add it up, and Cincinnati Parks manages more than 10 percent of city land.