Region
United States
702
China
127
Europe
70
Developing countries
69
India
62
Alaska
58
Outer space
52
Asia
33
Japan
32
European Union countries
25
Colorado
23
Great Britain
23
Africa
19
California
19
Germany
19
Mars (Planet)
18
Wyoming
17
Latin America
16
Moon
16
Russia (Federation)
16
Mediterranean Region
15
Italy
12
Canada
11
Mexico
11
Middle East
11
Soviet Union
11
Australia
10
Spain
10
Tropics
10
Arizona
9
Florida
9
New York (State)
9
Africa, Sub-Saharan
8
Brazil
8
Gulf Coast (U.S.)
8
Idaho
8
Michigan
8
South Africa
8
Washington (State)
8
West (U.S.)
8
Glen Canyon Dam (Ariz.)
7
Iran
7
North America
7
Oregon
7
Russia
7
Texas
7
Arctic regions
6
Balkan Peninsula
6
Georgia
6
Grand Canyon
6
more ...