Region
United States
16
Colorado
8
Alaska
5
California
5
Yellowstone National Park
5
Michigan
4
United States Virgin Islands
4
Rocky Mountain National Park
3
Washington (State)
3
Wyoming
3
Arizona
2
Bent's Old Fort National Historic Site
2
Grand Teton National Park
2
Hawaii
2
Isle Royale National Park
2
Katmai, Mount (Alaska)
2
Kilauea Volcano (Hawaii)
2
Lassen Volcanic National Park
2
New Mexico
2
Rocky Mountains
2
Saint John
2
West Virginia
2
Apache County
1
Bent's Old Fort National Historic Site (Colo.)
1
Bryce Canyon National Park
1
Buck Island Reef National Monument
1
California, Northern
1
Chesapeake and Ohio Canal National Historical Park
1
Colorado Plateau Region
1
Death Valley (Calif. and Nev.)
1
Death Valley National Park (Calif. and Nev.)
1
Denali National Park and Preserve
1
Denali National Park and Preserve (Alaska)
1
Dinosaur National Monument (Colo. and Utah)
1
East (U.S.)
1
Elwha River Watershed
1
Everglades
1
Florida
1
Fort Davis National Historic Site
1
Fort Davis National Historic Site (Tex.)
1
Gauley River National Recreation Area
1
Gauley River National Recreation Area (W. Va.)
1
Great Basin National Park
1
Great Basin National Park (Nev.)
1
Great Smoky Mountains National Park (N.C. and Tenn.)
1
Harpers Ferry Region
1
Hawaii Volcanoes National Park (Hawaii)
1
Indiana
1
Indiana Dunes National Lakeshore
1
Indiana Dunes National Park (Ind.)
1
more ...