Region
Pennsylvania
315
United States
203
Ohio River Valley
173
Mississippi River Valley
144
Philadelphia
140
Delaware River Valley (N.Y.-Del. and N.J.)
139
Delaware River (N.Y.-Del. and N.J.)
99
New Jersey
87
Mississippi River
82
Delaware River
75
Ohio River
56
Susquehanna River
55
New York (State)
54
Penn
46
Schuylkill River
46
Schuylkill River (Pa.)
45
Virginia
44
Delaware
41
Northwest, Old
38
Susquehanna River Valley
36
Philadelphia (Pa.)
35
Shenandoah River Valley (Va. and W. Va.)
35
Hudson River Valley (N.Y. and N.J.)
34
Ohio
29
West (U.S.)
26
North America
25
Louisiana
23
West Virginia
23
Missouri River
22
Canada
20
Delaware River Estuary
20
Lehigh River Valley
20
Mohawk River Valley (N.Y.)
20
Northwestern States
19
Delaware River Watershed (N.Y.-Del. and N.J.)
18
Minnesota
18
Delaware River Valley
17
Maryland
17
États-Unis
16
Lehigh River Valley (Pa.)
16
Columbia River
15
Hudson River
15
Kentucky
15
America
14
Hudson River (N.Y. and N.J.)
14
Potomac River
13
Camden
12
Mississippi, Vallée du
12
Saint Lawrence River
12
New France
11
more ...