The closure of the mines in 2002 Historical milestone · Almadén, Valle de Alcudia, Ciudad Real Image of Almadén, not of the place itself. The fall in the price of mercury and the international restrictions on account of its toxicity led to the halt of extraction in 2002, after centuries of uninterrupted activity. The shafts were converted shortly afterwards into a mining park open to visitors. 2002 Photo: Raimundo Pastor (CC BY-SA 3.0 es) What to see and do in Almadén