Region
Puerto Rico
7
California
5
United States
5
North America
4
Spain
4
Colorado
3
Latin America
3
Mexico
3
New Mexico
3
Santa Monica Mountains National Recreation Area (Calif.)
2
Amistad National Recreation Area
1
Amistad National Recreation Area (Tex.)
1
Angola
1
Argentina
1
Brazil
1
Buenos Aires
1
Buenos Aires (Argentina)
1
Caribbean Area
1
Chamizal National Memorial (El Paso, Tex.)
1
Chile
1
El Chamizal (Mexico and Tex.)
1
Folclore
1
Formentera
1
Formentera (Spain)
1
Germany
1
Hawaii
1
Iceland
1
Inyo National Forest (Calif. and Nev.)
1
Japan
1
Los Padres National Forest
1
Los Padres National Forest (Calif.)
1
Madrid
1
Panama
1
Peru
1
Pinnacles National Park
1
Pinnacles National Park (Calif.)
1
Saguaro National Park (Ariz.)
1
Santa Monica Mountains National Recreation Area
1
Six Rivers National Forest
1
Six Rivers National Forest (Calif.)
1
Southwest, New
1
Sólheimajökull
1
Sólheimajökull (Iceland)
1
Texas
1
Yosemite National Park (Calif.)
1
Yosemite Valley (Calif.)
1
Zaire (Province)
1