Geographic Subject
United States
13
India
9
Russia (Federation)
7
Philippines
5
Soviet Union
5
Polar regions
4
Former Soviet republics
3
Siberia
3
Sun
3
Africa, Southern
2
America
2
Florida
2
Great Britain
2
Kansas
2
Pakistan
2
Rhode Island
2
Russia
2
Siberia (Russia)
2
Africa, Eastern
1
Alabama
1
Americas
1
Arkansas
1
Asie du Sud-Est
1
Baikal, Lake (Russia)
1
Baltic States
1
Bulgaria
1
China
1
Colorado
1
Denmark
1
Earth
1
Ethiopia
1
Europe
1
Europe, Eastern
1
Europe, Northern
1
Finland
1
Inde
1
Indiana
1
Japan
1
Kerala
1
Komi
1
Lena River Watershed
1
Lena River Watershed (Russia)
1
New Hampshire
1
New Jersey
1
North Carolina
1
Panama Canal (Panama)
1
Pennsylvania
1
Russia, Northern
1
South Africa
1
Southeast Asia
1
more ...