few years ago my wife took me to Ireland for my 50th birthday, we stayed a couple days in Dublin and stayed at the Westin. GREAT location for Dublin nightlife, being right at the top of Grafton street.
but the highlight was we drove cross country and stayed at the Ashford Castle
https://en.wikipedia.org/wiki/Ashford_Castle
Beautiful old castle, very accommodating staff, really first rate stay. We ate a couple meals at the castle, good, but nothing crazy. A couple of the staff we got friendly with suggested some restaurants in the town a short walk away in Cong. We actually met up with staff a couple nights as they would head to town after shift to unwind.
Rooms were a little small, vintage and had some quirks you's expect from an almost 800 year old castle. I think it was about $2k a night
We did some falconry, shot some trap, rode some horses... and every morning my wife would take the Irish Wolfhounds for a walk
Side note, my wife did some pre planning and got me on the very land my fathers family farmed before immigrating to the US.