Region
Adriatic Sea
1
Afghanistan
1
Africa
3
Africa, Sub-Saharan
1
Alexandria
1
America
2
Antarctica
1
Arab countries
4
Argentina
1
Asia
1
Athens
1
Athens (Greece)
2
Atlanta
1
Atlanta (Ga.)
1
Australia
1
Austria
1
Baja California (Mexico : Peninsula)
1
Baja California (Peninsula)
1
Balkan Peninsula
1
Baltic States
1
Baltimore (Md.)
1
Berkeley
1
Brazil
5
Burma
1
Byzantine Empire
2
California
14
Canada
3
Canada, Western
1
Caucasus, Northern
1
Caucasus, Northern (Russia)
1
Cayman Islands
1
Central Valley
1
Chicago (Ill.)
1
Chile
3
China
20
Communist countries
1
Congo (Democratic Republic)
1
Cuba
1
Delphi (Extinct city)
1
Denmark
3
Detroit
1
Detroit (Mich.)
1
Developing countries
3
Earth (Planet)
1
Egypt
4
El Salvador
1
England
7
Europe
13
Europe, Western
1
European Union countries
3
more ...