Region
Africa
1
Africa, East
1
Africa, West
1
Alabama
9
Alaska
1
Alberta
1
Amazon River Region
1
Andes Region
2
Angleterre
1
Antarctica
2
Appalachian Mountains
1
Appalachian Region
3
Appalachian Region, Southern
5
Arizona
2
Arkansas
1
Aroostook County
1
Asia
2
Australia
7
Austria
1
Belize
2
Benelux countries
1
Bloomington
1
Boise, Idaho
1
Boston
2
Boston (Mass.)
5
Brazil
1
Broadway (New York, N.Y.)
3
California
12
Canada
9
Caribbean Area
2
Carmel (Calif.)
1
Carraízo Reservoir Watershed
1
Carraízo Reservoir Watershed (P.R.)
1
Carroll County
2
Channel Islands
1
Charleston (S.C.)
1
Charleston County
1
Chattanooga
2
Chattanooga (Tenn.)
1
Chicago
2
China
8
Chiricahua Mountains
1
Coffee County
1
Colombia
1
Colorado
2
Connecticut
1
Cornwall (England : County)
1
Coventry
1
Coventry (England)
1
Czech Republic
1
more ...