We invite the visitor to discover two of the largest tungsten exploration of the country during the Second World War, here in the magical mountains of Arouca Geopark. In both, tungsten also known as wolfram was extracted at that time widely used in military applications. With access by jeep 4x4 and scientific visit with an interpreter guide, for the more adventurous, we suggest discovering these hidden mines. With the very interesting particularity that one of them was explored by allied forces
(Regoufe) and the other by the Germans (Rio de Frades) with a distance of only 4km from each other.