Magic Route of Oia Activity · Oia, Baixo Miño, Pontevedra Image of Oia, not of the place itself. A waymarked eighteen-kilometre route that runs parallel to the sea through the municipality's four coastal parishes, Mougás, Viladesuso, Pedornes and Santa María, linking hillforts, petroglyphs and viewpoints over the Atlantic. Photo: HombreDHojalata (CC BY-SA 3.0 es) What to see and do in Oia