🇮🇪 Ireland · Megalith
Beltany Stone Circle
Early to Late Bronze Age · Bronze Age Ulster (Donegal tradition)
44.5 m Donegal hilltop circle — 64 stones around platform cairn, one of Ireland's largest, Beltane-associated.
🇮🇪 Ireland · Megalith
Kilclooney Portal Tombs
Middle Neolithic · Irish Portal Tomb tradition
Two portal tombs and court tomb at Kilclooney More, Ardara, capstone 30 tons, c.3500 BCE.
🇮🇪 Ireland · Earthwork
Grianan of Aileach
Iron Age to Early Medieval (c.1000 BCE–1100 CE) · Iron Age Gaelic → Early Medieval Uí Néill
Donegal hilltop royal cashel (23.5 m diameter) on Greenan Mountain — northern Uí Néill kingship inauguration fort.