My wife said ti give you a couple more ideas.
In Dublin, you can stay in Clontarf Castle - a 19th century castle which has been renovated into a nice hotel.
Interwebz says it is very expensive, so maybe you just drive by and take photos. lol
http://www.clontarfcastle.ie/
(not us)
Also in Dublin, you can visit the Kilmainham Jail - a museum on the history of Irish nationalism which offers guided tours of the building. This was also the filming location of the prison scenes in the movie, "
In the Name of the Father".
