Maryland Zoo
The Maryland Zoo in Baltimore is generally considered to be the third oldest (or by some other circumstances, the second oldest) zoological park in the United States, having opened in 1876, sixteen years after the historic Park itself was purchased and opened to the city public.
Gambrill Mill at Monocacy National Battlefield
Monocacy National Battlefield is a unit of the National Park Service, the site of the Battle of Monocacy in the American Civil War fought on July 9, 1864. The battlefield straddles the Monocacy River southeast of the city of Frederick, Maryland.
Ohiopyle State Park
Ohiopyle State Park is a Pennsylvania state park on 19,052 acres (7,710 ha) in Dunbar, Henry Clay and Stewart Townships, Fayette County, Pennsylvania in the United States. The focal point of the park is the more than 14 miles (23 km) of the Youghiogheny River Gorge that passes through the park.
Tayamentasachta Park
Tayamentasachta, a Center for Environmental Studies hosts environmental education programs for students of the Greencastle-Antrim School District.