Falun Mine - Credit: Wikimedia Commons
Falun Mine () was a mine in Falun, Sweden, that operated for a millennium from the 10th century to 1992. It produced as much as two-thirds of Europe's copper needs and helped fund many of Sweden's wars in the 17th century. Technological developments at the mine had a profound influence on mining globally for two centuries.ICOMOS, p. 5 The mine is now a museum and in 2001 was designated a UNESCO World Heritage Site. Read more on Wikipedia
Source: en.wikipedia.org