Eiras oak Nature · San Amaro, Carballiño, Ourense Oak of some five hundred years growing in the parish of Eiras, in front of the pazo dos Tizón, the most notable survivor of the oak groves that once covered the slopes above the castro of Las. Its bearing stands out in a concello that has lost a third of its population since 2001 and whose average age is around sixty-five. Photo: The original uploader was Lanobriga at Galician Wikipedia. (CC BY-SA 2.5 es) What to see and do in San Amaro