Region
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Indiana
7
Islands of the Pacific
7
Kenya
7
Latin America
7
Minnesota
7
Mississippi River Valley
7
North Dakota
7
Ontario
7
Prince William Sound
7
Prince William Sound (Alaska)
7
Seattle (Wash.)
7
Tahoe, Lake (Calif. and Nev.)
7
Washington (D.C.)
7
West Virginia
7
Wyoming
7
Camp Lejeune
6
Camp Lejeune (N.C.)
6
Chesapeake Bay Region (Md. and Va.)
6
Ecuador
6
France
6
Great Smoky Mountains National Park (N.C. and Tenn.)
6
Gulf Coast
6
Hudson River (N.Y. and N.J.)
6
Inyo National Forest (Calif. and Nev.)
6
Kootenai National Forest (Mont. and Idaho)
6
Maryland
6
Mexico City (Mexico)
6
Middle Atlantic States
6
Missouri
6
Nebraska
6
New York
6
Poland
6
Salton Sea
6
Southwest, New
6
Alabama
5
Arctic National Wildlife Refuge
5
Arctic National Wildlife Refuge (Alaska)
5
British Columbia
5
Canada, Western
5
East Asia
5
Flint
5
Flint (Mich.)
5
Greece
5
Guadalupe Mountains National Park
5
Guadalupe Mountains National Park (Tex.)
5
Gulf Coast (La.)
5
Himalaya Mountains Region
5
Maine
5
Mississippi River Region
5
New York (N.Y.)
5
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