Region
Africa
2
Alaska
6
America
1
Arena, Point (Calif.)
1
Arizona
3
Asia
1
Atlantic Coast (U.S.)
1
Atlantic Ocean
1
Banks Lake (Wash.)
1
Big Horn County
1
Big Thompson River Valley
1
California
11
Chesapeake Bay Region (Md. and Va.)
1
China
1
Colorado
10
Cook Inlet Region
1
Denali National Park and Preserve (Alaska)
1
Earth (Planet)
3
Elephant Butte Reservoir (N.M.)
1
England
1
Everest, Mount (China and Nepal)
1
Flaming Gorge Dam (Utah)
2
Florida
2
Florida Keys
1
Florida Keys National Marine Sanctuary (Fla.)
1
Fort Ord (Calif.)
1
Gambia
1
George Washington Carver National Monument (Mo.)
1
Georgia
3
Germany
1
Gila River Valley (N.M. and Ariz.)
1
Glen Canyon Dam (Ariz.)
1
Grand Coulee Dam
1
Grand Coulee Dam (Wash.)
8
Grand Teton National Park (Wyo.)
1
Gray's Reef National Marine Sanctuary
3
Gray's Reef National Marine Sanctuary (Ga.)
5
Green River (Utah)
1
Gulf Coast
1
Gulf Coast (La.)
1
Hawaii
1
Honeycombs Wilderness
1
Honeycombs Wilderness (Wyo.)
1
Houston Region
1
Hungry Horse Dam (Mont.)
1
Hungry Horse Reservoir (Mont.)
1
India
2
Jupiter (Planet)
7
Lodore, Canyon of (Colo.)
1
Loma Prieta Region
1
more ...