🇮🇪 Ireland · Megalith
Fourknocks Passage Tomb
Neolithic (c.3200–2800 BCE) · Boyne Valley Passage Tomb tradition
Meath passage tomb with wide cruciform chamber, timber-roofed instead of cairn, and profuse engraved art including anthropomorphs.
🇮🇪 Ireland · Megalith
Knockroe Passage Tomb
Neolithic (c.3200–2800 BCE) · Boyne Valley Passage Tomb tradition
Kilkenny dual-passage tomb with lavish megalithic art, aligned to both midwinter sunrise and sunset.
🇮🇪 Ireland · Megalith
Loughcrew Cairn T (Hag's Cairn)
Late Neolithic · Boyne / Loughcrew passage tradition
35 m Loughcrew chief tomb with cruciform chamber whose art is illuminated by equinox sunrise.
🇬🇧 United Kingdom · Megalith
Knockmany Passage Tomb (Annia's Cove)
Late Neolithic · Boyne / Loughcrew tradition (western outlier)
Hilltop 15 m passage tomb with three decorated stones (spirals/lozenges) — westernmost Boyne-style tomb in Ulster.
🇮🇪 Ireland · Megalith
Carrowkeel Passage Tomb Complex
Late Neolithic · Loughcrew-Carrowkeel passage tradition (Boyne variant)
14 hilltop passage cairns (10–21 m) on Bricklieve ridges above Lough Arrow, with cruciform chambers and light boxes.
🇬🇧 United Kingdom · Megalith
Slieve Gullion Passage Tombs
Middle Neolithic to Bronze Age · Irish Passage Tomb / Bronze Age
Summit and north passage tombs on Slieve Gullion (573 m), south cairn cruciform, Bronze Age kerb reuse, c.3500 BCE.
🇫🇷 France · Megalith
Cairn du Petit Mont
Early to Late Neolithic · Morbihan Atlantic Neolithic
Three-phase promontory cairn (60 m) at Arzon with two superimposed passage graves and anthropomorphic art.
🇫🇷 France · Megalith
Locmariaquer Megaliths
Middle Neolithic (~4700–4000 BCE) · Carnac Neolithic (Castellic)
Three interlinked monuments on the Gulf of Morbihan: the shattered 20.6-m Grand Menhir Brisé – heaviest moved stone in Europe at 280 tonnes before earthquake toppling; the Table des Marchand passage…
🇬🇧 United Kingdom · Megalith
Bryn Celli Ddu
Late Neolithic to Early Bronze Age · Irish Sea Passage Tomb tradition
Anglesey passage tomb with 8.4 m passage aligned to midsummer sunrise and decorated spiral stone.
🇮🇪 Ireland · Megalith
Newgrange
Neolithic · Irish Middle Neolithic (Boyne Valley)
Grand passage tomb in the Bend of the Boyne with 85 m diameter cairn, decorated kerbstones and cruciform chamber. Famous for winter solstice sunrise illuminating chamber through roof-box.
🇮🇪 Ireland · Megalith
Knowth
Neolithic · Boyne Valley Neolithic
Largest passage tomb complex in Brú na Bóinne: Great Mound with two passages (east-west) and 18 satellite tombs.
🇮🇪 Ireland · Megalith
Dowth
Neolithic · Boyne Valley Neolithic
Westernmost of three great Brú na Bóinne tombs, 85 m diameter, two passages and souterrain. Less restored, preserving original form. Associated winter sunset alignment.