Baltimore is the largest city in Maryland and the 24th largest city in the country. It is located along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Dubbed "Charm City", Baltimore is a colorful, diverse city known for its beautiful harbor and distinct neighborhoods. Baltimore's project is being led by representatives from a group of organizations, including the city's Office of Sustainability, Baltimore City Recreation and Parks, Baltimore City Public Schools, Blue Water Baltimore, Audubon of Maryland and DC, the Parks and People Foundation, Reservoir Hill Improvement Council and NWF's Maryland affiliate, the National Aquarium. The primary goal of the project is to restore natural habitat to benefit both wildlife and the local water quality.