Region
United States
21
Earth (Planet)
10
North America
5
Byzantine Empire
3
England
3
Istanbul (Turkey)
3
London
3
California
2
Canada
2
China
2
Florida
2
Hawaii
2
New York (State)
2
Niagara Falls (N.Y. and Ont.)
2
Ontario
2
Outer space
2
Pennsylvania
2
Polar regions
2
Angkor (Extinct city)
1
Berlin
1
Cambodia
1
Carthage (Extinct city)
1
Charleston (S.C.)
1
Chicago
1
Europe
1
Everglades (Fla.)
1
France
1
Germany
1
Great Britain
1
Great Rift Valley
1
Great Wall of China (China)
1
Greece
1
Hawaii Island
1
Illinois
1
India
1
Johannesburg
1
Kilauea Volcano (Hawaii)
1
Los Angeles
1
Mediterranean Region
1
Montana
1
Philadelphia
1
San Francisco Bay Area
1
Seattle
1
South Africa
1
Toronto
1
Utah
1
Washington (State)
1
Yorktown (Va.)
1