Ireland, one of three best celtic places in the world to visit (the others being Scotland and Wales).

You can't go wrong, wherever you travel in Ireland. I don't care for the cities, but if you go to Dublin, go to the Guinness Hopstore and (if you love history) see the Book of Kells at Trinity College.

I've never been to Cork, but I'd love to see the south. I've heard Cobh is lovely.