Church of Santa María de Casaio Monument · Carballeda de Valdeorras, Valdeorras, Ourense Parish church of Casaio, the hamlet that gives its name to the only yew grove in Galicia; its parish extends over a valley marked later by the slate quarries and the wolfram mines. Photo: Adrián Estévez (Estevoaei) (CC BY-SA 4.0) What to see and do in Carballeda de Valdeorras