Nature route from the Castros to Nivieira Activity · Rubiá, Valdeorras, Ourense Image of Rubiá, not of the place itself. A waymarked path, PR-G 144, that runs between the castros of the municipality as far as the village of Nivieira, crossing the driest landscape in Galicia, with barely 594 millimetres of rain a year and an average of 12.9 degrees. Photo: Tanja Freibott (CC BY-SA 4.0) What to see and do in Rubiá