Region
Pennsylvania
3
Philadelphia
3
Delaware
2
Philadelphia (Pa.)
2
United States
2
Brandywine Creek Valley (Pa. and Del.)
1
Brandywine Region
1
Brandywine Region (Del.)
1
Christiana Region
1
Christiana Region (Del.)
1
New York
1
New York (État)
1
New York (N.Y.)
1
New York (State)
1
Pennsylvanie
1
Philadelphie
1
Potomac River
1
Potomac River Valley
1