Region
Penn
19
Pennsylvania
16
Philadelphia
8
Independence National Historical Park (Philadelphia, Pa.)
2
Allegheny Co
1
Berks (Comté)
1
Berks County
1
Berks County (Pa.)
1
Chester
1
Delaware Co
1
Fort Mifflin (Philadelphia, Pa.)
1
Hopewell Furnace National Historic Site
1
Hopewell Furnace National Historic Site (Pa.)
1
Hopewell Furnace National Historic Site (Penns.)
1
Lebanon Co
1
Luzerne Co
1
Montgomery Co
1
New Jersey
1
New York
1
New York (State)
1
Pennsylvanie
1