Region
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Boston (Mass.)
3
Brazil
3
Confederate States of America
3
Connecticut
3
Cuba
3
Estados Unidos
3
George Washington Birthplace National Monument
3
Georgia
3
Hudson River (N.Y. and N.J.)
3
Illinois
3
Kansas
3
Korea
3
North America
3
Ohio River Valley
3
Oklahoma
3
Oregon
3
Rome
3
Russia (Federation)
3
Valley Forge
3
Valley Forge (Pa.)
3
West Virginia
3
Arlington
2
Asia
2
Barranquilla
2
Beltsville
2
Bosnia and Herzegovina
2
Chesapeake Bay Region (Md. and Va.)
2
Chile
2
Colombia
2
El Prado (Barranquilla, Colombia)
2
Europe, Eastern
2
Former Soviet republics
2
Germany
2
Iraq
2
Jefferson National Forest
2
Laredo
2
Laredo (Tex.)
2
Liberia
2
Loudoun County
2
Northeast Passage
2
Ohio
2
Philippines
2
Potomac River
2
Rhode Island
2
Sierra Leone
2
South America
2
South Dakota
2
Srebrenica
2
Tajikistan
2
Thomas Stone National Historic Site
2
more ...