Region
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Georgia
4
Guatemala
4
Himalaya Mountains
4
Indiana
4
Iowa
4
Istanbul
4
Kibale Forest Reserve
4
Kings Canyon National Park
4
London (England)
4
Mediterranean Sea
4
Mexico, Gulf of
4
Norway
4
Okavango River Delta
4
Okavango River Delta (Botswana)
4
Philippines
4
Poland
4
Red Sea
4
Sahara
4
San Francisco
4
Sequoia National Park
4
Siberia
4
South Atlantic States
4
Tennessee
4
Tokyo
4
Uganda
4
Africa, Eastern
3
Africa, West
3
Arab countries
3
Atlantic Ocean
3
Bulgaria
3
Buri︠a︡tii︠a︡
3
Central Park (New York, N.Y.)
3
Chesapeake Bay (Md. and Va.)
3
Denmark
3
Estonia
3
Foreign countries
3
French Polynesia
3
Greenland
3
Hong Kong
3
Iceland
3
Idaho
3
Istanbul (Turkey)
3
Jamaica
3
Kentucky
3
Klondike River Valley (Yukon)
3
Kyoto
3
Long Island (N.Y.)
3
Malaysia
3
Martha's Vineyard (Mass.)
3
Metaponto Region
3
more ...