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Almadén is a town and municipality in the Spanish province of Ciudad Real, within the autonomous community of Castile-La Mancha. The town is located at 4° 49' W and 38° 46' N and is 589 meters (1,932 ft) above sea level. Almadén is in the Sierra Morena. The name Almadén is from the Arabic: المعدن, romanized: al-maʻdin, lit. 'the metal', 'the mineral' or 'lode', and so by extension, the place where these are excavated, 'the mine'. Originally a Roman, and later, a Moorish mining settlement when taken from the Visigoths, the town was captured by the Christians in 1151 under king Alfonso VII and given to the Knights of the Order of Calatrava.
The mercury deposits of Almadén account for the largest quantity of liquid mercury metal produced in the world. Approximately 250,000 metric tons (280,000 short tons) of mercury have been produced there in the past 2000 years. Due to the toxicity of mercury and its byproducts to humans, the mine has variously employed penal labour, slave labour, and prisoners of war over its long history. Almadén mine stopped working in 2002, due to the European mercury mining prohibition. In 2006, the mine opened to the public who can visit the first level, 50 metres (160 ft) underground.
In 2012, Almadén and Idrija (Slovenia) were declared World Heritage Sites, with the nomination "Heritage of Mercury".
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No data on: train station, EV chargers, street market, pool, care home.
Data from OpenStreetMap (ODbL), extract from October 2026: we count what is mapped within the municipal boundary. "No data" means OpenStreetMap doesn't have it, not that it doesn't exist. Completed with Overture Maps (CDLA-Permissive-2.0): the pharmacies, health centres, petrol stations, banks, cash machines, food shops and schools that OpenStreetMap was missing. Town hall contact details: General Database of Local Entities (Spanish Ministry of Finance); tourist offices: each region's open registry, where it publishes one. Connectivity: Spanish Ministry for Digital Transformation, % of homes covered in June 2025.
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