A 60m-high limestone outcrop topped by a group of buildings, the Rock of Cashel is Ireland’s Acropolis. Evoking Celtic Christianity and the high kings of Ireland, Cashel’s jewel is Cormac’s Chapel; the perfectly preserved 28m-high round tower is made of uneven sandstone blocks. The cathedral ruins date back to the 13C. The Hall of the Vicars Choral was the clergy's dwelling. The museum displays items relating to the Rock. Visible from afar, this is Ireland’s most spectacular historic site.