Cleveland Metroparks is an extensive system of
nature preserves in
Greater Cleveland,
Ohio. The various reservations, which largely encircle the city of
Cleveland, tend to follow the rivers and creeks that flow through the region. Referred to unofficially as the 'Emerald Necklace', the network of parks spans over and includes hundreds of miles of walking, bicycle, and horse trails as well as numerous picnic areas, nature education centers,
golf courses, and countless fishing spots. In addition, the district includes the
zoo in Cleveland. Several of the reservations are adjacent to
Cuyahoga Valley National Park.