Cahercommaun

2mi/3km southeast of Temple Cronan near Poulnabrone Dolmen, high above a steep-sided valley, stands Cahercommaun (National Monument), a ninth century stone ring-fort with three circuits of ramparts. The innermost ring, almost exactly circular, contains three chambers; the two outer rings, linked by radial walls, are semicircular, ending at steep drops. Excavations in the 1930s revealed the presence of buildings of various periods within the area of the fort.