Region
United States
152
America
14
West (U.S.)
11
Europe
9
Solar system
9
Outer space
6
Middle East
5
Earth (Planet)
4
U.S. states
4
Canada
3
Great Plains
2
Oklahoma
2
Texas
2
Antietam (Md.)
1
Dawson (Yukon)
1
Former Soviet republics
1
Grand Coulee Dam (Wash.)
1
Italy
1
Lewis and Clark National Historic Trail
1
Navajo Nation, Arizona, New Mexico & Utah
1
Russia
1
San Francisco (Calif.)
1
Sioux Nation
1
Wyoming
1