Region
20th century
1
Alameda Co
1
Alameda County
3
Alameda County (Calif.)
4
Alaska
4
Alcatraz Island
2
Alcatraz Island (Calif.)
1
Alder Creek Site (Calif.)
1
Alpine County
1
Alpine County (Calif.)
1
America
7
American River (Calif.)
1
American Samoa
1
American Valley, Calif
1
Amérique du Nord
1
Anaheim
1
Andhra Pradesh
1
Angel Island
1
Angel Island (Calif.)
1
Appalachian Region
1
Apple Valley
1
Aquatic Park
1
Aquatic Park (San Francisco, Calif.)
1
Arches National Park
1
Arizona
6
Armenia (Republic)
1
Artesia Region (N.M.)
1
Arvin
1
Asia
1
Aurora
1
Australia
3
Austria
1
Baja California
1
Baja California (Mexico : Peninsula)
8
Baja California (Peninsula)
4
Bakersfield
1
Baltimore
3
Baltimore (Md.)
2
Barrio Logan (San Diego, Calif.)
1
Berkeley
21
Berkeley (Calif.)
2
Bernal Heights (San Francisco, Calif.)
1
Beverly Hills (Calif.)
1
Bodega Head
1
Bodie
1
Boston
5
Boston (Mass.)
1
Boston metropolitan area
1
Boyle Heights
1
Boyle Heights (Calif.)
1
more ...