Geography
United States
721 results
Pennsylvania
111 results
West Virginia
81 results
Alaska
79 results
Great Britain
79 results
Colorado
71 results
Wyoming
71 results
England
57 results
Montana
55 results
Kentucky
53 results
Illinois
50 results
Utah
50 results
Alabama
39 results
Ohio
39 results
Appalachian Region
38 results
Oklahoma
34 results
Campbell County
31 results
New Mexico
27 results
France
26 results
Texas
26 results
Virginia
20 results
China
19 results
West (U.S.)
19 results
Wales
18 results
Powder River Basin (Wyo. and Mont.)
17 results
Germany
16 results
Maryland
16 results
North Dakota
15 results
Tennessee
14 results
Europe
13 results
Indiana
13 results
Kansas
12 results
Washington (State)
11 results
Australia
10 results
Carbon County
10 results
Missouri
10 results
Scotland
10 results
Arizona
8 results
Japan
8 results
Belgium
7 results
Midlands (England)
7 results
Canada
6 results
Converse County
6 results
Great Plains
6 results
Ireland
6 results
Poland
6 results
Fayette County
5 results
Huntington
5 results
Iowa
5 results
New York (State)
5 results
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