A dolmen or portal tomb is a type of single-chamber megalithic tomb, usually consisting of two or more upright megaliths supporting a large flat horizontal capstone or "table". Most date from the Late Neolithic period and were sometimes covered with earth or smaller stones to form a tumulus. Small pad-stones may be wedged between the cap and supporting stones to achieve a level appearance. In many instances, the covering has eroded away, leaving only the stone "skeleton".
A megalith is a large stone that has been used to construct a prehistoric structure or monument, either alone or together with other stones. There are over 35,000 structures or arrangements in Europe alone, located widely from Sweden to the Mediterranean sea.
Boyle is a town in County Roscommon, Ireland. It is located at the foot of the Curlew Mountains near Lough Key in the north of the county. Carrowkeel Megalithic Cemetery, the Drumanone Dolmen and the lakes of Lough Arrow and Lough Gara are also close by. As of 2022, the population of the town was 2,915. The town is in a civil parish of the same name and in the barony of Boyle.
Cabinteely is a suburb of Dublin's southside. It is in Dún Laoghaire–Rathdown, County Dublin, Ireland. The population of all electoral divisions labelled as Cabinteely was 15,864 as of the 2022 census.
Carrowmore is a large group of megalithic monuments on the Coolera Peninsula to the west of Sligo, Ireland. They were built in the 4th millennium BC, during the Neolithic. There are thirty surviving tombs, making Carrowmore one of the largest clusters of megalithic tombs in Ireland, and one of the 'big four' along with Carrowkeel, Loughcrew and Brú na Bóinne. Carrowmore is the heart of an ancient ritual landscape which is dominated by the mountain of Knocknarea to the west. It is a protected National Monument.
Brehon's Chair, sometimes Druid's Chair, is a megalithic site, and national monument, in Whitechurch, Rathfarnham, Dún Laoghaire–Rathdown, County Dublin, Ireland.
Poulnabrone dolmen is a large dolmen located in the Burren, County Clare, Ireland. Situated on one of the region's most desolate and highest points, it comprises three standing portal stones supporting a heavy horizontal capstone and dates to the early Neolithic period, with estimates from 4200 BC to 2900 BC. Although not the largest, it is the best known of the approximately 172 dolmens in Ireland.
Legananny Dolmen is a megalithic dolmen or cromlech nine miles southeast of Banbridge and three miles north of Castlewellan, both in County Down, Northern Ireland. It is on the slopes of Slieve Croob near the village of Leitrim, in Drumgooland parish, nestled between the farmer's stone wall and a back road. It is a State Care Historic Monument sited in the townland of Legananny, in Banbridge District, at grid ref: J2887 4339.
Cherrywood is a developing suburb of Dublin, Ireland, bordering Cabinteely, Loughlinstown and Rathmichael. It is located to the southeast of the city, in Dún Laoghaire–Rathdown. The development commenced on a greenfield site in 1998 and primarily comprises Cherrywood Business Park and new residential and retail development. Development of the suburb stalled following the economic downturn, but resumed in the late 2010s and remains in continuous state of development as of late 2024.
Brownshill Dolmen is a very large megalithic portal tomb situated 3 km east of Carlow, in County Carlow, Ireland. Its capstone weighs an estimated 150 metric tons, and is reputed to be the heaviest in Europe. The tomb is listed as a National Monument. Known as the Kernanstown Cromlech, sometimes spelled as Browneshill Dolmen, it is sited on the former estate house of the Browne family from which it takes its name.
Megalithic monuments in Ireland typically represent one of several types of megalithic tombs: court cairns, passage tombs, portal tombs and wedge tombs. The remains of over 1,000 such megalithic tombs have been recorded around Ireland.
Kilclooney More is a townland in the northwest of Ireland in coastal County Donegal. It is situated halfway between Narin and Ardara at the R261 on the Loughrea Peninsula.
Ballykeel Dolmen is a neolithic tripod portal tomb and a State Care Historic Monument at the foot of the western flank of Slieve Gullion in Northern Ireland. It is located above a tributary of the Forkhill river, in the Newry, Mourne and Down District Council area, at grid ref: H9950 2132.
The Knockeen Portal Tomb is a megalith in Knockeen, County Waterford, Ireland. It is the largest dolmen in County Waterford exhibiting a double capstone configuration, though it is not the tallest standing stone structure. It is one of the finest examples of a dolmen in Ireland.
The Gaulstown Portal Tomb or Gaulstown Dolmen is a megalithic portal tomb situated in Gaulstown, Butlerstown in County Waterford in the Republic of Ireland. It lies about 7 km south west of Waterford City.
Kiltiernan Tomb, also called Kiltiernan Portal Tomb or Kiltiernan Dolmen, is a dolmen located in County Dublin, Ireland. It is a National Monument.
Proleek Dolmen is a dolmen and National Monument located in County Louth, Ireland.
Ballynageeragh Portal Tomb is a dolmen and National Monument situated in County Waterford, Ireland.
Knockmaree Dolmen, or Knockmaree Cist, is a prehistoric site of the Neolithic period, in Phoenix Park just north of Chapelizod, near Dublin, Ireland. Other forms of the name are Knockmary or Knockmaroon Dolmen, or Cnoc-Maraidhe.
Aideen's Grave is a collapsed megalithic dolmen located in the grounds of Howth Castle in north County Dublin, Ireland.
