Region
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Dauphin Island
6
Europe, Western
6
India
6
Nebraska
6
New Guinea
6
New Orleans
6
North America
6
Papua New Guinea
6
Philadelphia
6
Somalia
6
Yellowstone National Park
6
Arkansas River
5
Berlin
5
East Asia
5
England
5
Floridan Aquifer
5
Front occidental
5
Greenland
5
Gulf States
5
Idaho
5
Indo-Pacific Region
5
Iran
5
Luzon
5
Luzon (Philippines)
5
Meuse River Valley
5
Mississippi River-Gulf Outlet Canal
5
Netherlands
5
Oceania
5
Russia
5
South Dakota
5
Syria
5
Tuskegee Army Air Field (Ala.)
5
Utah
5
Wyoming
5
Allemagne
4
Arctic regions
4
Austria
4
Birmanie
4
Borgne, Lake
4
Borgne, Lake (La.)
4
Brownsville (Tex.)
4
Buffalo
4
Buffalo (N.Y.)
4
Camp Pike (Ark.)
4
Chicago
4
Chicago (Ill.)
4
Columbia River Watershed
4
Fort Bragg
4
Fort Wagner (S.C.)
4
Four Corners Region
4
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