Region
United States
24
Alaska
18
New Jersey
11
Wyoming
11
Colorado
10
Texas
10
Utah
10
Grand Teton National Park (Wyo.)
9
Arizona
8
California
8
Florida
8
Grand Teton National Park
8
Maryland
8
New York (State)
8
Gateway National Recreation Area (N.J. and N.Y.)
7
Virginia
6
Big Cypress National Preserve (Fla.)
5
Louisiana
5
Montana
5
New York
5
North Carolina
5
Pennsylvania
5
Cape Lookout National Seashore (N.C.)
4
Chamizal National Memorial (El Paso, Tex.)
4
Delaware Water Gap National Recreation Area (N.J. and Pa.)
4
Glacier National Park (Mont.)
4
Middle Delaware National Scenic and Recreational River (N.J. and Pa.)
4
New Mexico
4
South Dakota
4
Washington (State)
4
Antietam National Battlefield
3
Antietam National Battlefield (Md.)
3
Apostle Islands National Lakeshore (Wis.)
3
Curecanti National Recreation Area
3
Curecanti National Recreation Area (Colo.)
3
Indiana
3
Indiana Dunes National Park (Ind.)
3
Massachusetts
3
Minnesota
3
Nevada
3
New River Gorge National Park and Preserve (W. Va.)
3
Ohio
3
Oregon
3
Portsmouth (N.C.)
3
Rock Creek Park (Washington, D.C.)
3
Sequoia and Kings Canyon National Parks (Calif.)
3
Voyageurs National Park (Minn.)
3
Washington (D.C.)
3
West Virginia
3
Wisconsin
3
more ...