Mourne Mountains in the context of "Ulster"

Carlingford Lough (Irish: Loch Cairlinn, Ulster Scots: Carlinford Loch) is a glacial fjord or sea inlet in northeastern Ireland, forming part of the border between Northern Ireland to the north and the Republic of Ireland to the south. On its northern shore is County Down, the Mourne Mountains, and the town of Warrenpoint; on its southern shore is County Louth, the Cooley Mountains and the village of Carlingford. The Newry River flows into the loch from the northwest.

Newgrange (Irish: Sí an Bhrú) is a prehistoric monument in County Meath in Ireland, placed on a rise overlooking the River Boyne, eight kilometres (five miles) west of the town of Drogheda. It is an exceptionally grand passage tomb built during the Neolithic Period, around 3100 BC, making it older than Stonehenge and the Egyptian pyramids. Newgrange is the main monument in the Brú na Bóinne complex, a World Heritage Site that also includes the passage tombs of Knowth and Dowth, as well as other henges, burial mounds and standing stones.

Newgrange consists of a large circular mound with an inner stone passageway and cruciform chamber. Burnt and unburnt human bones, and possible grave goods or votive offerings, were found in this chamber. The monument has a striking façade made mostly of white quartz cobblestones, and it is ringed by engraved kerbstones. Many of the larger stones of Newgrange are covered in megalithic art. The mound is also ringed by a stone circle. Some of the material that makes up the monument came from as far as the Mournes and Wicklow Mountains. There is no agreement about its purpose, but it is believed it had religious significance. It is aligned so that the rising sun on the winter solstice shines through a "roofbox" above the entrance and floods the inner chamber. Several other passage tombs in Ireland are aligned with solstices and equinoxes, and Cairn G at Carrowkeel has a similar "roofbox". Newgrange shares similarities with some other Neolithic monuments in Western Europe; especially Gavrinis in Brittany, which has a similar preserved facing and large carved stones, Maeshowe in Orkney, with its large corbelled chamber, and Bryn Celli Ddu in Wales.

Warrenpoint is a small port town and civil parish in County Down, Northern Ireland. It sits at the head of Carlingford Lough, south of Newry, and is separated from the Republic of Ireland by a narrow strait. The town is beside the village of Rostrevor and is overlooked by the Mournes and Cooley Mountains. Warrenpoint sprang up within the townland of Ringmackilroy (from Irish Rinn Mhic Giolla Ruaidh 'McIlroy's point'), and is locally nicknamed "The Point", which also represents the town's full name in Irish, An Pointe.

Warrenpoint is known for its scenic location, the Maiden of Mourne festival, the Blues on the Bay music festival, the passenger ferry service between Warrenpoint and Omeath and the nearby Narrow Water Castle. Warrenpoint Port is second in terms of tonnage handled by ports in Northern Ireland. It had a population of 9,091 at the 2021 Census.

Slieve Donard (/ˌsliːv ˈdɒnərd/ SLEEV DON-ərd; from Irish Sliabh Dónairt, meaning 'Dónairt's mountain') is the highest mountain in Northern Ireland, the highest in Ulster, and the seventh-highest in Ireland, with a height of 850 metres (2,790 ft). The highest of the Mourne Mountains, it is near the town of Newcastle on the eastern coast of County Down, overlooking the Irish Sea. It is also the highest mountain in the northern half of Ireland.

The Mourne Wall – built in the early 20th century – runs up the western and southern slopes of the mountain, joining a small stone tower at the summit. Also on the summit are the remains of two ancient burial cairns, one of which is the remains of the highest known passage tomb in Ireland. In Irish mythology the mountain was associated with the mythical figures Boirche and Slángha. It was later associated with, and named after, Saint Donard, who was said to have made the summit his hermitage. Up until the 1830s, people would climb the mountain as part of a yearly pilgrimage, which may have originally been a Lughnasadh (harvest) ritual. Royal Engineers camped on the summit for four months in 1826 as part of the Ordnance Survey's Principal Triangulation. It is located in the southeastern part of Northern Ireland.

The Mourne Wall (Irish: Balla an Mhúrn) was constructed to enclose a catchment area of the Silent Valley Reservoir in the Mourne Mountains, Northern Ireland. The 1.5 m (4 ft 11 in) high stone wall, which was built to keep livestock from contaminating water supplies, took almost twenty years to complete (1904 to 1922). The project was overseen by the Belfast City and District Water Commissioners.

The Silent Valley Reservoir is a reservoir located in the Mourne Mountains near Kilkeel, County Down in Northern Ireland. It supplies most of the water for County Down, surrounding counties and most of Belfast. It is owned and maintained by Northern Ireland Water Limited (formerly DRD Water Service). The reservoir was built between 1923 and 1933 by a workforce of over 1,000 men, nine of whom died during construction.

Ben Crom Reservoir is a reservoir located in the Mourne Mountains near Kilkeel, County Down, Northern Ireland. Along with Silent Valley Reservoir, which is situated further down the Kilkeel River valley, it supplies water for County Down, surrounding counties and most of Belfast. It was constructed between 1953 and 1957, as the final part of the Mourne scheme to provide water to Belfast which started with the passing of the Belfast Water Act in 1893.

Ben Crom is a mass gravity dam, meaning it is made of concrete and designed so that the dam's own weight stabilises it against the force of the water. The middle of the structure consists of mass concrete with granite plumbs weighing up to 5 tonnes. The outer face of the dam was made with precast concrete blocks. The project cost approximately £1 million to build and employed 186 people.