One of the oldest underground mining systems in Siegerland is the so-called Einsturzer Stollen. This gallery as well as many others is installed in the hill named Eisernhardt. The hill is 480 metres high. About 70 metres below the mountain peak we find the entrance. The Einsturzer Stollen has the highest gallery system in our region, besides the mine "Stracke Birke". Nowadays no entrance is possible because of collapse. Mining at Eisernhardt was first mentioned in the middle of the 16th century but nobody knows whether the Einsturzer Stollen had been installed before that time. A document of 1772 mentions the mine’s production of that year. The gallery is installed up to 240 metres straight into the hill to reach the ore lodes. Next it leads in direction of the mine "Alte Sinterzeche". Opposite the entrance there is a boulders dump. On top of the dump a pine was planted which is now very impressive. It is said, this tree was planted in memory of a mineworker who died by accident.

Below the dump large amounts of slag residues can be found. They show that the bog iron ore of the mine was roasted and smelted right here on site. However, there was no research so far when all this happened. Later, exclusively specular iron was mined form the deeper galleries. In May 1859, Einsturzer Stollen was one of twenty mines that consolidated to “Eisernhardter Tiefbau” (Eisernhardt Underground Mining). All in all, the mine hauled 4.5 million tons of iron stone before the pit was closed down after the last shift on June 29th, 1957.