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⚒️ Heritage of Mercury. Almadén and Idrija

Archaeology & Antiquity Spain Europe

⚒️ Heritage of Mercury. Almadén and Idrija
Transnational mercury mining complex in Spain and Slovenia, inscribed 2012


🕐 3 min read · Updated 9 Apr 2026 at 17:23

UNESCOUNESCO World Heritage Site

📌 Fast Facts
  • Location: Almadén, Ciudad Real province, Spain; Idrija, Slovenia
  • Core site area: 0.22 hectares; buffer zone: 223.4 hectares
  • Mining period: Almadén—antiquity to recent decades; Idrija—circa AD 1490 onwards
  • UNESCO inscription: 2012

The Heritage of Mercury. Almadén and Idrija is a transnational serial property comprising two mercury mining complexes that represents one of only two sites globally to have produced mercury at industrial scale over extended periods. Located in Almadén, Ciudad Real, Spain, and Idrija, Slovenia, this UNESCO World Heritage Site preserves underground galleries, processing installations, hoisting machinery, and worker infrastructure spanning more than two thousand years of extraction. The Heritage ...

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