🇮🇪 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.
🇬🇧 United Kingdom · Megalith
Bryn Cader Faner
Early Bronze Age · Snowdonia Early Bronze Age
8.7 m Snowdonia crown cairn with 18 angled slate pillars and 2 m outlier — most photogenic Bronze Age tomb in Wales.
🇬🇧 United Kingdom · Megalith
Ballymeanoch Stone Row and Henge
Late Neolithic – Early Bronze Age · Kilmartin Neolithic/Bronze Age
Four-stone chlorite row (to 2.8 m) with 70 cup marks, adjacent cairns and ploughed henge in Kilmartin Glen.
🇬🇧 United Kingdom · Megalith
Callanish IV (Ceann Hulabhaig)
Late Neolithic · Hebridean Late Neolithic
Six-stone flattened circle (13.3×9.5 m) with central robbed cairn, 2.2 km south of Callanish I.