Near to the motorway from Dublin-Carlow-Kilkenny-Waterford:
Kildare, The National stud and the Curragh-if you are there early monring you will see the racehorses being worked on the gallops.
Moone and Castledermot High crosses.(I have a kind of high cross obsession,we adapted one of the panel pictures from Moone for our wedding invitations!!).
http://www.megalithicireland.com/High%20Cross%20Moone.htm
Carlow
http://www.rootsweb.ancestry.com/~irlcar2/dolmen.htm Biggest dolmen in Europe
http://www.carlowcountymuseum.com/carlow-county/duckets-
grove/index.html Mock Gothic romantic ruin with restored wall garden.
Plenty threads on Kilkenny city here.
Waterford, the new "House of crystal", Reginald's tower.