Region
Accomack County
1
Afghanistan
37
Africa
27
Africa, Central
1
Africa, East
1
Africa, Eastern
3
Africa, North
4
Africa, Southern
4
Africa, Sub-Saharan
34
Africa, West
3
Alabama
26
Alameda County
1
Alameda County (Calif.)
1
Alaska
19
Alaska, Gulf of
1
Alberta
1
Algeria
2
Allegheny County
1
Allegheny National Forest
1
Allegheny National Forest (Pa.)
1
America
11
American Samoa
5
Andes (Regi⯮)
1
Andes Region
1
Andes region
1
Andhra Pradesh
1
Angleterre
1
Appalachian Region
5
Appalachian Region, Southern
1
Arab countries
12
Arctic Ocean
1
Argentina
2
Arizona
18
Arkansas
19
Arkansas Delta
2
Arkansas River Watershed
1
Armenia
1
Armenia (Republic)
3
Ashumet Valley
1
Asia
34
Asia Oriental
1
Asia, Central
1
Asie
1
Asie de l'Est
1
Asie du Sud-Est
1
Atlantic Coast (South Atlantic States)
1
Atlantic Ocean
1
Atlantic States
1
Austin
1
Australasia
2
more ...