Region
United States
6
Greece
2
Mexico
2
Africa
1
Amazon River Region
1
Angkor (Extinct city)
1
Athens (Greece)
1
Cambodia
1
Cardiff (N.Y.)
1
Carthage (Extinct city)
1
China
1
Civilization, Ancient
1
England
1
Europe
1
Hawaii
1
Hawaii Island
1
Italy
1
Japan
1
Kilauea Volcano (Hawaii)
1
Lourdes (France)
1
New York (State)
1
Oklahoma
1
Ostia (Extinct city)
1
Palenque Site (Mexico)
1
Pennsylvania
1
Peru
1
Rome
1
Teotihuacán Site (San Juan Teotihuacán, Mexico)
1
Tibet Autonomous Region (China)
1
Troy (Extinct city)
1
Tulsa
1
Tulsa (Okla.)
1
Utah
1