Troña serpent petroglyph Curiosity · Ponteareas, Condado, Pontevedra Image of Ponteareas, not of the place itself. Two rock carvings with snake figures were documented at the hillfort of Pías; one remains in situ and the other was moved to the old museum at Pías. Local tradition attributes them to a mythical serpent that lived on the hill. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Ponteareas