A-C
- Adare Castle - Adare County Limerick - A medieval fortified castle that was an important stronghold of the Earl of Desmond.
- Altamount Gardens - Tullow, County Carlow - Old world garden, Robinsonian in style.
- Ardfert Cathedral - Ardfert, County Kerry - 12th to 17th century Cathedral.
- Athenry Castle - Athenry, County Galway - 13th century, 3 storey tower house
- Aughnanure Castle - Oughterard, County Galway - 16th century tower house.
- Ballyhack Castle - Ballyhack, County Wexford - 15th century tower house built by the Knights Hospitallers of St. John
- Barryscourt Castle - Carrigtwohill, County Cork - 15th to 16th century Castle.
- Oldbridge Estate - site of Battle of the Boyne
- Boyle Abbey - Boyle, County Roscommon - 12th century Cistercian Monastery.
- Brú na Bóinne - Donore, County Meath Neolithic monuments and interpretative centre.
- Carrowmore Megalithic Cemetery, County Sligo Neolithic monuments and interpretative centre.
- Connemara National Park, County Galway - 20 square kilometre park surrounding the Twelve Bens mountains.
- Coole Visitor Centre - Gort, County Galway, Nature reserve, former home of Lady Gregory, one of the founders of the Abbey Theatre
- Corlea Trackway Visitor Centre - Kenagh, County Longford - an Iron Age bog road, dating from 148BC.
Read more about this topic: Heritage Sites (Ireland)