Region
United States
113
Colorado
17
Great Britain
17
Soviet Union
8
Germany
5
East Asia
4
Europe, Eastern
4
Southeast Asia
4
China
3
Europe
3
France
3
Vietnam
3
West (U.S.)
3
Alaska
2
Asia, Eastern
2
Cuba
2
Czechoslovakia
2
England
2
Middle East
2
New York
2
New York (State)
2
North Carolina
2
Outer space
2
Pakistan
2
Poland
2
Virginia
2
Adams County
1
Adams County (Colo.)
1
Africa
1
Alaska Peninsula
1
Alaska Peninsula (Alaska)
1
Antietam National Battlefield (Md.)
1
Arabian Sea
1
Berlin
1
Berlin (Germany)
1
Booker T. Washington National Monument (Va.)
1
Bosnia and Herzegovina
1
Boston
1
Brooklyn (New York, N.Y.)
1
Bryce Canyon National Park
1
Bryce Canyon National Park (Utah)
1
California
1
Canada
1
Cape Hatteras National Seashore (N.C.)
1
Castillo de San Marcos National Monument (Saint Augustine, Fla.)
1
Catonsville
1
Catonsville (Md.)
1
Charleston
1
Charleston (S.C.)
1
Clara Barton National Historic Site (Md.)
1
more ...