Region
Pennsylvania
Philadelphia
35
United States
16
Pittsburgh
4
Maryland
3
Philadelphia (Pa.)
3
Allegheny National Forest
2
Allegheny National Forest (Pa.)
2
France
2
New Jersey
2
Philadelphia Region
2
Adams County (Pa.)
1
Allegheny County
1
Bradford County (Pa.)
1
Bucks County (Pa.)
1
Camden
1
Chester County (Pa.)
1
Cumberland County (Pa.)
1
Danville
1
Dauphin County (Pa.)
1
Delaware
1
Delaware County (Pa.)
1
Franklin County (Pa.)
1
Harrisburg (Pa.)
1
Jefferson County
1
Jefferson County (Pa.)
1
Lancaster County (Pa.)
1
Monongahela River (W. Va. and Pa.)
1
Montgomery County (Pa.)
1
Northeastern States
1
Philadelphia Region (Pa.)
1
Pittsburgh Region
1
Pittsburgh Region (Pa.)
1
Schuylkill River (Pa.)
1
York County (Pa.)
1