The Roter Bär Pit in Sankt Andreasberg in the Upper Harz is an iron ore mine that was worked from about 1800 until the 1860s. Today it is operated as a show mine under the name of Roter Bär Pit Educational Mine by the Sankt Andreasberg Society for History and Archaeology. The name Roter Bär means "Red Bear".
In line with historical practice the funds required to restore the historic mine were raised through the formation of a mining trades union and issue of share certificates.
Wikipedia https://en.wikipedia.org/wiki/Roter_Bär_Pit
Official Website https://www.lehrbergwerk.de/
Address 37444, Germany
Coordinates 51°42'45.303" N 10°31'39.906" E