Region
United States
273
Colorado
78
Virginia
11
Iraq
5
North Carolina
5
Arlington
4
Salisbury
4
Afghanistan
3
Missouri
3
Asia
2
California
2
Louisiana
2
Nevada
2
New York (State)
2
Ohio
2
Oregon
2
Outer space
2
Pacific States
2
Washington Metropolitan Area
2
Abbeville
1
Albert Pike Recreation Area
1
Albert Pike Recreation Area (Ark.)
1
Arkansas
1
Atlanta
1
Black Hawk
1
Boston
1
Buffalo
1
Canada
1
Central City
1
Channel Islands National Marine Sanctuary
1
Chesapeake Bay Watershed
1
Cripple Creek
1
Denver
1
Georgia
1
Hawaii
1
Idaho
1
Illinois
1
Iowa
1
Kentucky
1
Las Vegas
1
Los Alamos
1
Louisville
1
Maryland
1
Massachusetts
1
Michigan
1
Middle West
1
Minnesota
1
Montana
1
New Mexico
1
New Orleans
1
more ...