Chestnut tree of Oreal Nature · Viana do Bolo, Viana, Ourense Image of Viana do Bolo, not of the place itself. A centuries-old chestnut tree in the parish of Hedroso, considered one of the most massive and long-lived specimens in Galicia; it grows in a traditional chestnut grove of the kind that supplied the whole comarca with chestnuts for centuries. Photo: Pilar Ponte (CC BY-SA 2.0) What to see and do in Viana do Bolo