Region
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American Memorial Park (Northern Mariana Islands)
4
American River (Calif.)
1
American Samoa
19
Amistad National Recreation Area
1
Amistad National Recreation Area (Tex.)
1
Amur River (China and Russia)
1
Anacostia Park
1
Anahuac National Wildlife Refuge
1
Anahuac National Wildlife Refuge (Tex.)
1
Anambra State
1
Anchorage
5
Andersonville National Historic Site (Ga.)
1
Andes Region
7
Andorra
3
Andrea Lawrence, Mount (Calif.)
1
Angel Island
1
Angeles National Forest
1
Angeles National Forest (Calif.)
1
Angola
4
Anguilla
1
Antarctic Ocean
1
Antarctica
18
Antietam National Battlefield
2
Antietam National Battlefield (Md.)
1
Antigua
1
Antigua and Barbuda
4
Antitrust law
1
Apache County
4
Apalachicola River
1
Apalachicola River Watershed
1
Apostle Islands National Lakeshore (Wis.)
2
Appalachian Region
17
Arab countries
14
Arabia Mountain National Heritage Area (Ga.)
3
Arapaho National Forest (Colo.)
10
Arapaho National Forest Region
1
Arapahoe County
1
Arches National Park (Utah)
2
Arctic National Wildlife Refuge
11
Arctic National Wildlife Refuge (Alaska)
8
Arctic Ocean
3
Arctic regions
16
Argentina
38
Arizona
157
Arizona Strip
1
Arizona Trail (Ariz.)
2
Arkansas
31
Arkansas Beach
1
Arkansas Beach (Alaska)
1
Arkansas River Watershed
1
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