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⚒️ Heritage of Mercury. Almadén and Idrija

Archaeology & Antiquity Spain Europe

⚒️ Heritage of Mercury. Almadén and Idrija
Mercury mining heritage spanning Spain and Slovenia


🕐 3 min read · Updated 2 Apr 2026 at 17:25

UNESCOUNESCO World Heritage Site

📋 Fast Facts
  • Serial UNESCO World Heritage property inscribed in 2012
  • Comprises mercury mining complexes at Almadén, Spain and Idrija, Slovenia—two of the world's largest mercury mines
  • Mercury extraction at Almadén dates to antiquity; Idrija deposit discovered circa 1490
  • Critical to global silver and gold extraction in the Americas from the 16th century onwards via amalgamation process

The Heritage of Mercury property represents a transnational serial site linking two major mercury mining complexes that shaped ...

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