The words of the engineer Juan Guillermo Thalacker after visiting the Arditurri mines in Oiartzun (Gipuzkoa) in 1803 represent this area's greatness and uniqueness.
Did you know that the Arditurri mines belong to the few mining galleries that have been exploited practically non-stop for 2,000 years? Nowadays, the mining area has been recovered after the Real Compañía Asturiana de Minas (Royal Asturian Mining Company) abandoned the mines in 1984.