Region
Alabama
1
Canada
1
Caribbean Area
1
Dismal Swamp
2
Dismal Swamp (N.C. and Va.)
4
Georgia
1
Kentucky
2
Mammoth Cave
1
Mammoth Cave (Ky.)
1
Martinique
2
Maryland
1
Mississippi
1
Mississippi River
11
Missouri
11
Ohio
1
Okefenokee Swamp (Ga. and Fla.)
1
Philadelphia (Pa.)
1
Southern States
8
United States
10
États-Unis
1