Mount Castelo Nature · Val do Dubra, Santiago, A Coruña Image of Val do Dubra, not of the place itself. A summit of 569 metres, the highest in the concello, crowned by the remains of an early medieval fortress. From it one commands the Dubra valley and a good part of the upper basin of the river Tambre. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Val do Dubra