🇬🇧 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.
🇬🇧 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.
🇬🇧 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.