Region
Colorado
60
New Mexico
30
United States
27
Utah
25
Greece
15
Arizona
12
Mexico
12
Mesa Verde National Park (Colo.)
11
Wyoming
11
Alaska
10
Italy
10
Oregon
10
Southwest, New
10
California
9
Ohio
9
Chaco Canyon
8
Chaco Canyon (N.M.)
8
Missouri
8
Pompeii (Extinct city)
8
Russia (Federation)
8
Turkey
8
Massachusetts
7
Palestine
7
Egypt
6
Great Britain
6
Illinois
6
Kansas
6
Troy (Extinct city)
6
America
5
Arkansas
5
Central America
5
China
5
Cuyahoga Valley National Park (Ohio)
5
Dolores River Valley (Colo. and Utah)
5
Israel
5
Mesa Verde National Park
5
Montana
5
Pennsylvania
5
South Carolina
5
Texas
5
Virginia
5
Athens (Greece)
4
Cuyahoga Valley National Park
4
England
4
Florida
4
Georgia
4
Great Plains
4
Jerusalem
4
Lincoln Home National Historic Site (Springfield, Ill.)
4
Manzanar National Historic Site
4
more ...