Seven sites around the country, including the Burren and Tara, have been submitted by the Government to the UN as potential nominees to the World Heritage List.
It is expected their candidacy will be considered at a meeting in Brazil at the end of July.
Two Irish sites are already on the UN's World Heritage list.
They are the prehistoric Brú na Bóinne complex of Newgrange, Knowth and Dowth in Co Meath and the seventh century monastic complex of Skellig Michael, 12km off the Co Kerry coast.
Citing their outstanding universal value, Environment Minister John Gormley has now submitted what is called a tentative list of seven additional nominees to join that company, following recommendations from an expert advisory group.
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.
Minister Gormley added that stakeholders here would be consulted before anything would be finalised.