Spent a few days in Thurles, hotel out on Dublin Road but wouldn't recommend the town for a break. We always drove away from the town to do anything.
Would recommend Roscrea Castle and Damer House, small enterance fee but gardens are free. Beautiful, if weather nice it is lovely to have picnic there.
A nice drive to Mitchellstown Caves (stop off in Horse and Jockey for nice rest), again small enterance fee but excellent. Have since visited the Dunmore Caves, Kilkenny.
Rock of Cashel, didnt visit as fee very expensive but maybe it would have been worth it.
Cahir castle, well worth a visit, again small enterance fee and lovely river/park beside it with egg shaped rock sculpture.