Cliffs Shaft Mine Museum
Drilling uncovered iron ore, and in 1879 the company opened the Cliffs Shaft, then known as the "New Barnum".[3] The mine was at one time the nation's largest producer of hematite, and shipped ore every year but one from 1887 until its eventual close.[2] The Cliffs Shaft mine complex was listed on the National Register of Historic Places in 1992.[6] Above ground, the Cliffs Shaft site covers 15 acres and includes three headframes and eight other buildings.The two 1919 headframes, mirror images of each other,[7] are unusual as a collaboration between mining engineers and a professional architect.Visitors can see mining artifacts, photographs and equipment, as well as a chemical lab, blasting items, and the engine house with its air compressor room.