The Lemberg, with an elevation of 420 m above sea level, is the highest peak in the Nahe valley region. It harbours among other mining points of interest a cultural-historical gem: a mediaeval cinnabar mine, the Schmittenstollen, the only mercury mine in Western Europe that has been developed into a visitable mine. The former worship site on the Lemberg that was consecrated to the god Mercury suggests that quicksilver was being mined here even in Roman times. Evidence, though, only exists for mining as far back as the 15th century, with three great periods of working, the last from 1936 to 1942, during which cinnabar was mined. In the gallery that is open to the public, the visitor can make out the sections that were worked in the Late Middle Ages by hammer and pick as well as those that were worked in the 20th century by machine and with explosives. This underground experience gives the visitor a taste of what it was like for generations of miners who worked the cinnabar mine over the centuries. The Schmittenstollen is open from April to October.