Here are The seven sites are the Burren, Céide Fields and Mayo Boglands, the monastic city of Clonmacnoise, Georgian Dublin and its Literary Tradition, early medieval monastic sites like Durrow, Glendalough, Kells and Monasterboice, royal sites like Cashel and Tara and the Western Stone Forts.
http://www.rte.ie/news/2010/0414/heritage.html