County Clare in the context of "Shannon Estuary"

A dolmen (/ˈdɒlmɛn/), 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 (4000–3000 BCE) and were sometimes covered with earth or smaller stones to form a tumulus (burial mound). 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".

In Sumba (Indonesia), dolmens are still commonly built (about 100 dolmens each year) for collective graves according to lineage. The traditional village of Wainyapu has some 1,400 dolmens.

The River Shannon (Irish: an tSionainn, Abhainn na Sionainne or archaic an tSionna) is the major river on the island of Ireland, and at 360 km (224 miles) in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of 16,900 km (6,525 sq mi), – approximately one fifth of the area of Ireland.

Known as an important waterway since antiquity, the Shannon first appeared in maps by the Graeco-Egyptian geographer Ptolemy (c. 100 – c. 170 AD). The river flows generally southwards from the Shannon Pot in County Cavan before turning west and emptying into the Atlantic Ocean through the 102.1 km (63.4 mi) long Shannon Estuary. Limerick city stands at the point where the river water meets the sea water of the estuary. The Shannon is tidal east of Limerick as far as the base of the Ardnacrusha dam. The Shannon divides the west of Ireland (principally the province of Connacht) from the east and south (Leinster and most of Munster; County Clare, being west of the Shannon but part of the province of Munster, is the major exception.) The river represents a major physical barrier between east and west, with fewer than thirty-five crossing points between the village of Dowra in the north and Limerick city in the south.

Lough Derg, historically Lough Dergart (Irish: Loch Deirgeirt), is a freshwater lake in the Shannon River Basin, Ireland. It is the third-biggest on the island of Ireland (after Lough Neagh and Lough Corrib) and the second largest lake in the Republic of Ireland.

It is a long, narrow lake, with shores in counties Clare (south-west), Galway (north-west), and Tipperary (to the east). It is the southernmost of three large lakes on the River Shannon; the others being Lough Ree and Lough Allen. Towns and villages on Lough Derg include Portumna, Killaloe & Ballina, Dromineer, Terryglass, Mountshannon and Garrykennedy.

Poulnabrone dolmen (Irish: Poll na Brón, lit. 'Hole of the Quernstone') is a large dolmen (or cromlech, a type of single-chamber portal tomb) 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 3800 and 3200 BC. Although not the largest, it is the best known of the approximately 172 dolmens in Ireland.

It was constructed on a unique karst landscape formed from limestone laid down around 350 million years ago. The dolmen was built by Neolithic farmers, who chose the location either for ritual, as a territorial marker, or as a collective burial site. What remains today is only the "stone skeleton" of the original monument; originally, it would have been covered with soil, and its flagstone capped by a cairn.

The Burren (/ˈbʌrən/ BURR-ən; Irish: Boirinn, meaning 'rocky district') is a karst/glaciokarst landscape centred in County Clare, on the west coast of Ireland. It measures around 530 square kilometres (200 sq mi), within the circle made by the villages of Lisdoonvarna, Corofin, Gort and Kinvara. The area includes such natural features as Mullaghmore hill and Ailladie cliffs, and historic monuments such as Poulnabrone dolmen and Caherconnell Stone Fort.The Burren National Park covers a small part of the Burren and is the smallest of the eight National Parks in Ireland, while the adjacent territory, including the Cliffs of Moher, is included in the Burren and Cliffs of Moher Geopark.

County Kerry (Irish: Contae Chiarraí) is a county on the southwest coast of Ireland, within the province of Munster and the Southern Region. It is bordered by two other counties; Limerick to the east, and Cork to the south and east. It is separated from Clare to the north by the Shannon Estuary. With an area of 4,807 square kilometres (1,856 sq mi) and a population of 156,458 as of 2022, it is the 5th largest of Ireland's 32 counties by land area, and the 15th most populous. The governing local authority is Kerry County Council.

Bounded by the Atlantic Ocean, Kerry is Ireland's most westerly county. Its rugged coastline stretches for 886 kilometres (551 miles) and is characterised by bays, sea cliffs, beaches and many small offshore islands, of which the Blaskets and the Skelligs are the most notable. The county's peninsulas have a hilly to mountainous topography, with the MacGillycuddy's Reeks on Iveragh rising to over 1,000 m (3,300 ft). By contrast, its interior regions are mostly flat, interspersed with low mountain ranges such as the Stacks and the Mullaghareirks. The climate of Kerry is dominated by the North Atlantic Current and is usually mild and humid, with abundant precipitation. This allows for the growth of a wide variety of temperate and sub-tropical plants not typically found at such northerly latitudes.

The Shannon hydroelectric Scheme was a major development by the Irish Free State in the 1920s to harness the power of the River Shannon. Its product, the Ardnacrusha power plant, is a hydroelectric power station located near Ardnacrusha within County Clare approximately 2.4 kilometres (1.5 mi) from the Limerick border. It is Ireland's largest river hydroelectric scheme and is operated on a purpose built headrace connected to the River Shannon. The plant includes fish ladders so that returning fish, such as salmon, can climb the river safely past the power station.

Completed within 7 years of Irish independence in 1922 at a cost which was equivalent to one fifth of the Irish state's annual budget, the plant enabled an enormous surge in demand for electricity across the country and demonstrated the ability of the new government to develop during a difficult financial period. The plant was constructed by the German company Siemens-Schuckert, although much of the design was done by Irish engineers and Ireland provided most of the labour force. The scheme involved changes to the flow of the whole river, multiple dams and bridges and the construction of a national power grid.

Uí Mháine, often Anglicised as Hy Many, was one of the oldest and largest kingdoms located in Connacht, Ireland. Its territory of approximately 1,000 square miles (2,600 km) encompassed all of what is now north, east and south County Galway, south and central County Roscommon, an area near County Clare, and at one stage had apparently subjugated land on the east bank of the Shannon, together with the parish of Lusmagh in Offaly.

There were two different Uí Mhaine, the Uí Mhaine of Tethbae and the Uí Mhaine of Connacht; these tribes were separated by the Shannon River. The people of the kingdom were descendants of Maine Mór, who won the territory by warfare. Its sub-kingdoms, also known as lordships, included – among others – Soghan, Corco Modhruadh, Delbhna Nuadat, Síol Anmchadha, and Máenmaige. These kingdoms were made up of offshoots of the Uí Mháine dynasty, or subject peoples of different backgrounds.