🇮🇪 Ireland · Earthwork
Corlea Trackway
Iron Age, Late La Tene 148 BCE · Late Iron Age La Tene Ireland
147 BCE Iron Age oak plank highway (3.2 m wide, 1.6 km) across Corlea Bog, largest European timber road built in one year.
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34 places in the atlas, 3 of them inscribed as UNESCO World Heritage.
🇮🇪 Ireland · Earthwork
Iron Age, Late La Tene 148 BCE · Late Iron Age La Tene Ireland
147 BCE Iron Age oak plank highway (3.2 m wide, 1.6 km) across Corlea Bog, largest European timber road built in one year.
🇮🇪 Ireland · Archaeological wonder
Late Bronze Age (Roscommon horizon) · Irish dryland-bog community
Late Bronze Age oak plank boardwalk (82 m, 1.4 m wide) across fen–raised bog transition at Monaghan.
🇮🇪 Ireland · Archaeological wonder
Iron Age (La Tène B / Gaelic Ireland) · Gaelic Iron Age Ireland
Eastern continuation (48 m asl, 53°37′N 07°50′W 53.62,-7.84 Cloonbreany 2 Cartron Rd N39 XT18) of the Iron Age Corlea Trackway (148 BC precise dendro of 18-m preserved hall, 148 BC autumn fell) bog…
🇮🇪 Ireland · Ancient village
Early Medieval (Early Christian Ireland) · Early Medieval Irish (Uí Briúin)
850-m early medieval alder causeway and 12 x 8 m platform (680–800 CE) — bog-edge iron working.
🇮🇪 Ireland · Ancient village
Late Iron Age (La Tène) · Irish Iron Age (Ulster–Connacht)
1.5-km Iron Age oak plank causeway (120 BCE) — Edercloon's wheeled transport togher.
🇮🇪 Ireland · Megalith
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 · Earthwork
Late Bronze Age to Early Medieval (c.1100 BCE–800 CE) · Atlantic Iron Age / Early Medieval Gaelic
Cliff-edge triple stone fort on Inishmore (6 ha) with massive chevaux-de-frise of jagged limestone — Ireland's most dramatic hillfort.
🇮🇪 Ireland · Earthwork
Early Medieval (8th–14th century CE) over Late Neolithic traces · Gaelic Early Medieval (Eoghanacht / Dalcassian)
Triple-walled Burren cashel on cliff spur above Carran — Early Medieval high-status ringfort with 13 house platforms.
🇮🇪 Ireland · Megalith
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
Late Neolithic – Early Bronze Age (c.2500–2000 BCE) · Late Neolithic / Chalcolithic Limerick
Ireland's largest stone circle (46 m, 113 stones) — embanked, contiguous orthostats on Lough Gur shore.
🇮🇪 Ireland · Megalith
Middle Neolithic – Bronze Age · Carrowmore passage/boulder tradition (early)
Ireland's largest cemetery — ~30 boulder dolmens around Listoghil passage tomb (3600 BCE), oldest on Cúil Irra peninsula.
🇮🇪 Ireland · Megalith
Late Neolithic · Boyne / Loughcrew passage tradition
35 m Loughcrew chief tomb with cruciform chamber whose art is illuminated by equinox sunrise.
🇮🇪 Ireland · Megalith
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.
🇮🇪 Ireland · Megalith
Late Bronze Age · Cork-Kerry recumbent circle tradition
Recumbent circle (9.3 m, 17 stones) above Glandore with midwinter sunset alignment and hut/fulacht complex.
🇮🇪 Ireland · Megalith
Early Neolithic · Early Neolithic Ireland (Lambay / Burren Neolithic)
Burren's iconic portal dolmen — 3.7 m capstone over 2.5 m chamber holding 33 Neolithic burials in limestone clint landscape.
🇮🇪 Ireland · Megalith
Early Neolithic · Court Tomb tradition (Western Neolithic Ireland)
55.5 m court tomb on Sligo coast — 13×10 m oval court to twin gallery, best preserved in northwest.
🇮🇪 Ireland · Megalith
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
Neolithic · Boyne Valley Neolithic
Largest passage tomb complex in Brú na Bóinne: Great Mound with two passages (east-west) and 18 satellite tombs.
