The circular stone sheepfolds Curiosity · Ferreras de Arriba, La Carballeda, Zamora Image of Ferreras de Arriba, not of the place itself. Spread across the woodland are preserved yards of circular plan raised in dry stone to shut in the sheep at night and protect them from the wolf, a pastoral architecture today almost without use. Photo: Carla Andrés Aranhol (CC BY-SA 4.0) What to see and do in Ferreras de Arriba