Region
19th century
1
Admiralty Islands
1
Afghanistan
3
Africa
17
Africa, French-speaking
1
Africa, French-speaking Equatorial
2
Africa, French-speaking West
7
Africa, North
3
Africa, Southern
2
Africa, Sub-Saharan
2
Africa, West
2
Agadir
1
Agate Fossil Beds National Monument
4
Agate Fossil Beds National Monument (Neb.)
5
Akers Pass Site
1
Akers Pass Site (Mo.)
1
Akiak
1
Alabama
5
Alaska
22
Albany
1
Alberta
4
Algeria
17
Algiers (Algeria)
1
Allen Parish
2
Amazon River Region
5
Amazon River Watershed
1
America
36
American Bottom
1
American Bottom (Ill.)
1
Amerique du Nord
1
Amherst County
1
Amherst County (Va.)
1
Amundsen Scott South Pole Station (Antarctica)
1
Amérique du Nord
1
Am⥲ica Latina
1
Anaktuvuk Pass
2
Anaktuvuk Pass (Alaska)
2
Andes
1
Andes Region
3
Andover
1
Ann Arbor
2
Ann Arbor (Mich.)
2
Antarctica
11
Antietam National Battlefield (Md.)
1
Antigua
2
Appalachian Region, Southern
3
Arab countries
2
Arches National Park
1
Arches National Park (Utah)
1
Arctic regions
3
more ...