Arditurri, Mining complex in Oiartzun, Spain

Arditurri is a former mining site in the mountains of Gipuzkoa with tunnels and shafts that penetrate deep into the hillside. An interpretation center displays historical equipment and explains the techniques used to extract iron ore.

Mining at Arditurri predates the Roman conquest; the clearest remains date from the 1st century AD, when silver-bearing galena was worked and drained through a cuniculus. In the Middle Ages iron was extracted for the surrounding ferrerías, and in 1328 Alfonso XI granted the Fuero de Ferrerías. The Compañía Guipuzcoana de Minas took over in 1830, Chavarri Hermanos built a railway to Pasajes for iron between 1902 and 1904, and the Real Compañía Asturiana de Minas closed the site in 1984.

The site reflects how the Basque region developed through mining and resource extraction from the mountains. The structures and passages visible today tell the story of the people who worked here and shaped the landscape.

Guided tours take visitors through the tunnels and show what conditions were like underground. Wear appropriate clothing as the passages are cool and damp, and check opening times before visiting.

The tunnels still display old mining tools and machines that miners operated by hand or simple power. These objects reveal how physically demanding and risky the work was for those who labored below ground.