Region
United States
85
Colorado
48
Florida
18
Asia
11
Florida Keys
11
Canada
10
Arizona
6
North America
6
Australia
5
California
5
Bangladesh
4
Big Cypress National Preserve
4
Big Cypress National Preserve (Fla.)
4
Caribbean Area
3
Chaffee County
3
China
3
Monroe County
3
Montana
3
New Mexico
3
Tennessee
3
West (U.S.)
3
Black Hawk (Colo.)
2
Brazil
2
Central City (Colo.)
2
Europe
2
Gilpin County
2
Gulf States
2
Hawaii
2
Idaho
2
Japan
2
Louisiana
2
Massachusetts
2
Mexico
2
Oklahoma
2
Philippines
2
Portugal
2
San Juan County
2
South Africa
2
Spain
2
Utah
2
White Sands National Monument
2
White Sands National Park (N.M.)
2
Alaska
1
Amazonas
1
Antarctica
1
Archuleta County
1
Arctic regions
1
Aspen
1
Big Hole National Battlefield
1
Big Hole National Battlefield (Mont.)
1
more ...