The Heimatverein Eiserfeld organizes guided tours from April until October on the first Sunday of the month, 2.00– 3.30 pm.
The Reinhold-Forster-Erbstollen (mine gallery) formed the entrance to, and a part of, the vast network of tunnels which undermines the suburbs of Eiserfeld and Eisern. It was part of the so-called Eisenzecher Zug, a composite mine with over 20 connected iron-ore mines. The adit, dating from 1879 and typical of the mining industry in the Siegerland, can be seen in Eiserfeld.
The tunnel was constructed on March 21st, 1805 to facilitate the extraction and mining of the Tretenbach corridors. At a maximum shaft depth of 1,350 m, it was said to be one of the deepest iron-ore mines in Europe. Iron-ore extraction continued until 29.02.1960.
After being used temporarily as a store for explosives, the Reinhold Forster Mine Gallery was taken over and fitted out by the Heimatverein Eiserfeld (a local heritage society) and can now be visited as an exhibition mine, being accessible for 470 m.
The mine gallery is named after the natural scientist and geologist Johann Reinhold Forster.