Assuming you do not want to stay all the time in Dublin, you can do day trips to locations such as Newgrange and Glendalough - probably best with organised day-trip coach tours as neither is easy to access by public transport, despite being relatively close to Dublin. For details of Glendalough and Newgrange (Bru na Boinne) see www.heritageireland.ie.
You can also comfortably do rail trips to towns such as Galway, Kilkenny or Belfast in a single day. See www.irishrail.ie. If you want to to visit more remote locations (Cliffs of Moher, Giant's Causeway etc) on a day trip basis, check out www.railtoursireland.com.
-:- Message from TripAdvisor staff -:-
This topic has been closed to new posts due to inactivity. We hope you'll join the conversation by posting to an open topic or starting a new one.
To review the TripAdvisor Forums Posting Guidelines, please follow this link: http://www.tripadvisor.com/pages/forums_posting_guidelines.html
We remove posts that do not follow our posting guidelines, and we reserve the right to remove any post for any reason.