Colorado
by Steve, Katherine, and Norah
| DeSoto and Swatstika Mine In Arizona
by George Kolb
| Poland...Wieliczka Salt Mine....
by Patricia Kay
| Sheep Tank Mine in KOFA National Wildlife Refuge, Arizona
by George Kolb
| The Sunflower Mine in Arizona - Updated February 2013
by George Kolb
|
Sulitjelma Mine
by Kasper Rehnman
| Richmond Main Colliery
by kaye.frost-smith
| Independence Mine State Historical Park
by Nancy
| Mossgruvan
by Jakob Ehrensvärd
| Stråssa
by Jakob Ehrensvärd
|