Arnao Mine and its Zinc Factory The mining landscape of Arnao emerged in the mid-19th century when the Real Compañía Asturiana de Minas started up the first mining enterprise in the region employing industrial techniques, reinforcing the project decades later with zinc metallurgy. 43.577096,-5.983522
Samuño Valley Ecomuseum and San Luis Pit San Luis came into being as a deep pit promoted by the Real Compañía Asturiana de Minas mining company, which was to change the appearance and life in the Samuño Valley, in the heart of the Nalón Valley, and almost a century later is the setting of the Samuño Valley Ecomuseum. 43.276161,-5.677206
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