Region
United States
7
Earth (Planet)
6
Africa
3
Earth
3
Africa South of the Sahara
2
Africa, North
2
Bangladesh
2
China
2
Europe
2
Mekong River
2
North America
2
South Asia
2
Afghanistan
1
Alabama
1
Americas
1
Asia
1
Asia, Southeastern
1
Bicol River (Philippines)
1
Cauvery River (India)
1
Central America
1
Colorado
1
Cuba
1
Far East
1
Florida
1
India
1
Iowa
1
Latin America
1
Maryland
1
Mexico, Gulf of
1
Miami-Dade County
1
Middle East
1
Nigeria
1
Red River Delta (Vietnam)
1
Salween River
1
Salween River Watershed
1
South America
1
Sri Lanka
1
Tonle Sap (Cambodia : Lake)
1
Zuo River (China)
1