R-Z
- Rathfarnham Castle - Rathfarnham, County Dublin
- Reginald's Tower - Waterford, County Waterford
- Rock of Cashel - Cashel, County Tipperary - traditional seat of the Kings of Munster
- Roscrea Castle - Roscrea, County Tipperary
- Ross Castle - Killarney, County Kerry
- St. Mary's Church - Gowran, County Kilkenny
- Scattery Island Cathedral and Monastery - County Clare - early Christian place of pilgrimage
- Sligo Abbey - Sligo, County Sligo
- Swiss Cottage - Cahir, County Tipperary
- Tintern Abbey - County Wexford - Cistercian abbey
- Trim Castle - Trim, County Meath - Norman castle
Read more about this topic: Heritage Sites (Ireland)