Region
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Amelia
1
America
8
American Canal (Tex.)
1
American Discovery Trail
2
American Falls Dam (Idaho)
2
American Memorial Park (Northern Mariana Islands)
3
American Samoa
19
Amistad National Recreation Area
1
Amistad National Recreation Area (Tex.)
2
Amérique centrale
1
Anacostia River (Md. and Washington, D.C.)
1
Anchorage
1
Anderson County
1
Andes Region
7
Angola
7
Animas River (Colo. and N.M.)
3
Animas River Watershed (Colo. and N.M.)
4
Annapolis
2
Anne Arundel County
1
Anniston
1
Antarctica
24
Apalachicola Bay
1
Apalachicola National Forest
1
Apalachicola River Watershed
2
Apostle Islands National Lakeshore (Wis.)
1
Appalachian Region
14
Appalachian Region, Southern
5
Appalachian Trail
2
Arab countries
14
Arabia Mountain National Heritage Area (Ga.)
1
Arabian Peninsula
3
Arapaho National Forest (Colo.)
1
Arches National Park (Utah)
6
Arctic National Wildlife Refuge
10
Arctic National Wildlife Refuge (Alaska)
23
Arctic Ocean
1
Arctic regions
37
Argentina
9
Arizona
104
Arizona Strip
1
Arkansas
27
Arkansas River
3
Arlington
3
Armenia (Republic)
5
Asia
68
Asia, Central
27
Assateague Island National Seashore (Md. and Va.)
1
Aswan High Dam (Egypt)
1
Athens
2
Atlanta
9
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