Set jewel-like in a languid, green valley bounded by rolling hills, the jagged ruins of this Cistercian abbey are breathtaking. The abbey was founded in 1194 by Donal Mór O'Brien, and his grandson, a former king of Thomond, is entombed in the abbey's northern wall. There are some interesting medieval and Romanesque carvings in the stone, including one of a bishop with a crosier. Corcomroe is a lonely spot, except for on Easter morning, when people come from miles around to celebrate Mass. It's quite a sight if you happen to be around.