The oak grove of Baio Nature · Zas, Terra de Soneira, A Coruña Image of Zas, not of the place itself. An oak wood of some three hundred centuries-old carballos that serves as a festival ground and a place of local gathering. It is one of the best preserved riverside woods in the surroundings of the town of Baio. Photo: Lameiro (CC BY-SA 4.0) What to see and do in Zas