Region
American Samoa
1
Antarctica
1
Arizona
2
Asia
1
Australia
3
California
1
Canada
5
Cape Lookout National Seashore (N.C.)
2
Chicago
1
Colombia
1
Egypt
1
Estados Unidos
1
Europe
1
Finland
1
Florida
1
Fort Larned National Historic Site (Larned, Kan.)
1
France
1
Great Britain
201
Guam
1
Illinois
1
India
2
Isle of Dogs (London, England)
1
Kansas
1
Kenya
2
Laredo
1
Larned
1
Latin America
2
Louisiana
1
Manitoba
5
Maryland, Southern
1
Mexico
1
Montezuma Castle National Monument
1
Montezuma Castle National Monument (Ariz.)
1
Moon
1
Morocco
1
New Jersey
1
North Carolina
2
Northern Mariana Islands
1
Petrified Forest National Park
1
Petrified Forest National Park (Ariz.)
1
Portsmouth (N.C.)
2
San Francisco Bay Area
1
Texas
1
Trinidad and Tobago
1
USA
1
United States
169
United States Virgin Islands
1
United States, West
1
Washington Metropolitan Area
1
West (U.S.)
4
more ...