Xubia-Castro Special Conservation Area Nature · San Sadurniño, Ferrol, A Coruña Image of San Sadurniño, not of the place itself. A Natura 2000 Network site of 2,074 hectares protecting the valleys of the Xubia and Castro rivers alongside the Forgoselo massif; more than half its area, 1,214 hectares, lies within the municipality of San Sadurniño. Photo: Arredista (CC BY-SA 3.0) What to see and do in San Sadurniño