Petroglyph of San Xoán de Arbo Curiosity · Arbo, Paradanta, Pontevedra Image of Arbo, not of the place itself. An engraved rock situated near the Miño, in the parish of San Xoán, testimony to the prehistoric occupation of the valley along with the Neolithic axe found at Cabeiras and today kept in the Museum of Pontevedra. Photo: JCNazza (CC BY 3.0) What to see and do in Arbo