Region
Nevada
19
Humboldt County
12
Alaska
10
California
10
Minnesota
10
Iron County
6
Michigan
6
Montana
6
Broadwater County
5
New York (State)
5
Koochiching County
4
Maine
4
Oregon
4
Utah
4
Antarctica
3
Franklin County
3
Gallatin County
3
Jefferson County
3
North Carolina
3
Beltrami County
2
Cholame Region
2
Colorado
2
Cook Inlet
2
Copper River Watershed
2
Idaho
2
Lake of the Woods County
2
Madison County
2
Maine, Gulf of
2
Mineral County
2
Mono County
2
Northeastern States
2
Nye County
2
Saint Lawrence County
2
San Andreas Fault (Calif.)
2
United States
2
Arizona
1
Bonner County
1
Cabarrus County
1
Canyonlands National Park (Utah)
1
Chugach National Forest
1
Clark County
1
Clearwater County
1
Cook Inlet (Alaska)
1
Copper River (Alaska)
1
Dickinson County
1
Eagle County
1
Esmeralda County
1
Franciscan Complex
1
Gogebic County
1
Goldrun Creek (Nev.)
1
more ...