Region
United States
8
Europe
3
Egypt
2
États-Unis
2
Great Britain
2
Greece
2
Boulder
1
California
1
Cape May (N.J.)
1
Chester County
1
Colorado
1
Cyzicus (Extinct city)
1
El Salvador
1
England
1
France
1
Germany (West)
1
Italy
1
Jerusalem
1
Netherlands
1
Pacific Coast
1
Pennsylvania
1
Salvador
1
Switzerland
1
Syria
1
Turkey
1