Region
North America
United States
39
Mexican-American Border Region
19
Mexico
14
Canada
7
Texas
6
California
5
South America
5
Central America
4
Great Plains
4
Los Angeles
4
West (U.S.)
4
America
3
Black Hills (S.D. and Wyo.)
3
China
3
Northwest, Pacific
3
South Dakota
3
West United States
3
Arizona
2
Cascade Range
2
Middle East
2
New York (State)
2
Oregon
2
Pacific Area
2
Patagonia (Argentina and Chile)
2
Rio Grande
2
Rio Grande (Colo.-Mexico and Tex.)
2
Saint Lawrence River
2
Suzhou Shi (Jiangsu Sheng)
2
Washington (State)
2
Africa
1
Appalachian Region
1
Bainbridge Island
1
Black Hills
1
Bunker Hill (Los Angeles, Calif.)
1
Cancún
1
Chavín de Huantar
1
Chavín de Huantar (Peru)
1
Cheyenne and Arapaho Reservation (Okla.)
1
Cheyenne-Arapaho Tribes of Oklahoma
1
Chiapas
1
Chiapas (Mexico)
1
Colorado River Watershed
1
Colorado River Watershed (Colo.-Mexico)
1
Dakota Territory
1
Developing countries
1
Easter Island
1
Egypt
1
England
1
Estados Unidos
1
more ...