Region
North America
20
Colorado
11
United States
9
Great Britain
4
Australia
3
Rocky Mountains
3
California
2
Costa Rica
2
Galapagos Islands
2
Northwest, Pacific
2
Solar system
2
Southwest, New
2
Utah
2
Yellowstone National Park
2
Africa
1
Appalachian Region, Southern
1
Boise Ridge
1
Canada, Western
1
Canyonlands National Park Region
1
Caribbean Area
1
Cascadia Subduction Zone
1
Central America
1
Chesapeake Bay (Md. and Va.)
1
Deep space
1
Earth (Planet)
1
Ecuador
1
Elwha River
1
Elwha River (Wash.)
1
Everglades (Fla.)
1
Everglades National Park (Fla.)
1
France
1
Front Range (Colo. and Wyo.)
1
Great Basin
1
Great Plains
1
Hawaii
1
Idaho
1
Jupiter (Planet)
1
Latin America
1
Louisiana
1
Mesa Verde National Park
1
Mesa Verde National Park (Colo.)
1
Middle Atlantic States
1
Missouri
1
Northwest Coast of North America
1
Outer space
1
Palau
1
Powell, Lake (Utah and Ariz.)
1
Rocky Mountain National Park
1
Rocky Mountain National Park (Colo.)
1
Rocky Mountains Region
1
more ...