Gold mines of Boinás Curiosity · Belmonte de Miranda, Oviedo, Asturias Image of Belmonte de Miranda, not of the place itself. The Romans worked one of the great gold deposits of the north-west here, and open workings and channels can still be made out at Boinás, Alvariza, Castañedo and La Brueba. The El Valle-Boinás lode was reopened in recent times. Photo: FDV (CC BY-SA 3.0) What to see and do in Belmonte de Miranda