Cliffs Shaft Mine Museum, Michigan

A former underground iron mine in Ishpeming, with some remarkable looking headframe structures, has been turned into a museum.  It is in the Marquette Iron Range, where many iron mines once operated. For years the Cleveland Cliffs Company operated the mine, which had a number of shafts accessing the ore mined below the surface, where as much as 65 miles of tunnels were constructed, at various depths, up to 1,360 feet underground. The mines closed here in 1967, and the museum opened in 1999.