The Rammelsberg is a mountain, 635 metres (2,083 ft) high, on the northern edge of the Harz range, south of the historic town of Goslar in the North German state of Lower Saxony. The mountain is the location of an important silver, copper, and lead mine, the only mine which had been working continuously for over 1,000 years when it finally closed in 1988. Since 1992, the visitor mine of Rammelsberg has become a UNESCO World heritage site.
The ore mines of the Rammelsberg are the only mines in the world which were in uninterrupted operation for over 1000 years. It and the medieval Old Town of Goslar with the Imperial Palace were placed on the UNESCO World Heritage List in 1992.