Michigan Copper Mining: The Black Powder Era
20:17
DISCOVERING | Copper Country
29:32
Keweenaw Crossing: Michigan's Elevator Bridge
52:50
The Controversy Surrounding The Michigan Relics Explained | The Michigan Relics | Real History
17:28
These Ancient Mines Transformed Prehistoric Europe
31:36
Michigan Logging Tools
28:10
Old Copper Culture: North America's Forgotten Metal Workers
56:34
I Went Mining For 12 Hours & Made $____?
18:44