Region
Pennsylvania
100
United States
44
New Jersey
33
Philadelphia
23
Delaware
22
Maryland
14
Northampton County (Pa.)
12
Chester County (Pa.)
10
Sussex County (Del.)
10
West Jersey
10
Bucks County (Pa.)
7
Kent County (Del.)
7
Philadelphia (Pa.)
7
Sussex County
7
Chester County
6
New Castle County (Del.)
6
Penn
6
Delaware River
5
Bucks County
4
Fayette County
4
Fayette County (Pa.)
4
Lancaster County (Pa.)
4
Northampton County
4
Southwest, New
4
West Virginia
4
Delaware River (N.Y.-Del. and N.J.)
3
Indiana County
3
Lancaster County
3
Mason-Dixon Line
3
New Castle County
3
Ohio
3
Salem County (N.J.)
3
Virginia
3
Worcester County
3
Worcester County (Md.)
3
Adams County
2
Altoona (Pa.)
2
Armstrong County
2
Berks County (Pa.)
2
Canada
2
Columbia County
2
Cumberland County (Pa.)
2
Deeds
2
Delaware and Raritan Canal (N.J.)
2
Elmira (N.Y.)
2
England
2
Greenwood Furnace State Park (Pa.)
2
Harford County
2
Huntingdon County (Pa.)
2
Ireland
2
more ...