The Mount Airy Forest, in Cincinnati, Ohio, was established in 1911. It was one of the earliest, if not the first, urban reforestation project in the United States. With nearly 1,500 acres, it's the largest park in Cincinnati's park system.
Location: 5083 Colerain Avenue, Cincinnati, Ohio
Area: 1,471 acres (595 ha)
Built: 1911
MPS: Historic Resources of the Cincinnati Park and Parkway System (1817-1959)