Spatial Coverage
- Clarke County (Va.)1
- Clay County (Kan.)1
- Clay County (W. Va.)1
- Clipperton Island1
- Cloud County (Kan.)1
- Coal Creek1
- Coal Creek (Colo.)1
- Cocke County (Tenn.)1
- Coffee County (Tenn.)1
- Connecticut.1
- Constance, Lake1
- Crawford County (Kan.)1
- Crested Butte1
- Crested Butte (Colo.)1
- Crested Butte.1
- Cripple Creek Mining District (Colo.)1
- Crowley County (Colo.)1
- Cullman County (Ala.)1
- Dallas (Tex.)1
- Dallas County (Tex.)1
