Kongsberg Silver Mines
The silver mines of Kongsberg, in Buskerud county in Norway, constitute the largest mining field in Norway, with over 80 different mines. It was the largest pre-industrial working place in Norway, with over 4,000 workers at its peak in the 1770s and supplied over 10% of the gross national product of the Danish–Norwegian union during its 335-year-long history: over 450,000 man-years were expended in the production.
Rössing uranium mine
The Rössing Uranium Mine in Namibia is the longest-running and one of the largest open pit uranium mines in the world and is located in the Namib Desert near the town of Arandis, which is 70 kilometres from the coastal town of Swakopmund. Discovered in 1928, the Rössing mine started operations in 1976 and, in 2005, produced 3,711 tonnes of uranium oxide, becoming the fifth-largest uranium mine with 8 per cent of global output. Namibia is the world's fourth-largest exporter of uranium.