Equally important as Glendalough in religious terms and a different kind of setting. And how could you miss Cashel, near Tipperary. Another hugely important religious site. It looks across Clew Bay on the northern side of which there are large numbers of small islands left behind by retreating glaciers. At low tide you can walk from one to another.
Legend has it that many victims of the famine are buried under the sands of Clew Bay.