Castro de Guimarás hillock Curiosity · Piñor, Carballiño, Ourense Image of Piñor, not of the place itself. A hillfort enclosure of sixty-four by fifty-four metres defended by the River Mirela, in a municipality where burial mounds have been documented since 1847 and where Roman pipes of stone and brick came to light at Barrán. Photo: Simon Burchell (CC BY-SA 4.0) What to see and do in Piñor