Region
Acadia National Park
4
Acadia National Park (Me.)
4
Africa
5
Africa, North
2
Africa, Southern
5
Africa, Sub-Saharan
1
Alabama
1
Algeria
2
Alvord Desert Wilderness
1
Alvord Desert Wilderness (Or.)
1
Amargosa Desert
1
Amargosa Desert (Nev. and Calif.)
6
America
3
Andalgala region
1
Antarctica
2
Arabian Peninsula
5
Arches National Park
1
Arches National Park (Utah)
1
Argentina
4
Arid regions
1
Arizona
36
Asia, Central
1
Atacama (Chile)
1
Atacama Desert
5
Atacama Desert (Chile)
7
Atacama Desert Region (Chile)
2
Atacama desert
1
Australia
13
Australian languages
1
Azraq
1
Badain Jaran Desert (China)
1
Baja California (Mexico : Peninsula)
1
Baja California (Peninsula)
1
Balochistān
1
Balochistān (Pakistan)
1
Barry M. Goldwater Air Force Range (Ariz.)
1
Barānīs
2
Barānīs (Egypt)
2
Bisbee (Ariz.)
1
Black Rock Desert
5
Black Rock Desert (Nev.)
2
Black Rock Desert Wilderness
1
Black Rock Desert Wilderness (Nev.)
1
Black Rock Desert-High Rock Canyon Emigrant Trails National Conservation Area
1
Bluejohn Canyon
1
Bolivia
5
Boston
1
Botswana
6
California
49
California Desert National Conservation Area
1
more ...