🇮🇪 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.
🇮🇪 Ireland · Archaeological wonder
Corduff Bog Trackway C (Corduff–Eglish Late Bronze Age Causeway)
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
Derryville Bog Track Cluster Extension (Littleton–Templemore North)
Neolithic to Iron Age consecutive · North Tipperary bog-edge farmers
North lobe extension of Derryville megacluster: 3 tracks (2450–220 BCE) plus wattle panel type-specimen.
🇮🇪 Ireland · Ancient village
Derryoghil & Tin Tab Bog Trackways (Derryoghil–Derragh Bog, Co. Longford)
Neolithic to Early Bronze Age (2750–2280 BCE) · Irish Neolithic–Early Bronze (Beaker transition, 2500 BCE)
700-m stacked bog road (2750 BCE brush under 2280 BCE oak plank) — only Neolithic→Bronze stacked reuse in Ireland.
🇮🇪 Ireland · Ancient village
Keenagh (Corlea 2) Bog Trackway (County Roscommon–Longford border)
Iron Age (Late Iron Age, La Tène D, 148 BCE) · Irish Iron Age (La Tène, Uisnech kingship)
Iron Age 1-km oak causeway (148 BCE) — Keenagh's in situ twin to Corlea 1, part of 5-trackway Shannon bog field.
🇮🇪 Ireland · Archaeological wonder
Corlea Bog Trackway Eastern Extension (Roscommon)
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
Derryoghill Trackway – Edercloon Wooden Platform (Longford)
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 · Temple complex
Clonmacnoise
Early Medieval (544–1552 CE) · Early Christian Gaelic (Columban tradition)
Great early monastery at Shannon-Esker crossing (544 CE) with cathedral, two round towers, three high crosses and 3,000 graves.
🇮🇪 Ireland · Ancient village
Clonbrin Causey (Edercloon) – Longford/Offaly Bog Road
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
Hill of Uisneach
Neolithic to Early Modern (c.4000 BCE–1600 CE) · Neolithic → Bronze Age → Iron Age → Early Medieval Gaelic
Mythic omphalos of Ireland — 182 m ceremonial hill with Lough Lugh summit lake, barrows and Bealtaine fire site.
🇮🇪 Ireland · Earthwork
Hill of Tara
Neolithic to Early Medieval (c.3400 BCE–1200 CE) · Neolithic → Iron Age La Tène → Early Medieval Gaelic
Ireland's paramount ceremonial landscape (142 ha) — Neolithic tomb, Lia Fáil kingship stone and Iron Age royal enclosure complex.
🇮🇪 Ireland · Archaeological wonder
Brasil – Bristol Phantom Isle of 1480 (pre-Hy-Brasil Atlantic)
Medieval cartographic (1325 Dalorto – 1865 nautical) · Dalortic–Bristol cartographic
Circular Bristol-sought phantom west of Ireland named for dyewood — searched 1480–81, circular on Dalorto 1325.
🇮🇪 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 · 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.
🇮🇪 Ireland · Archaeological wonder
Kish-Ombor Bog Track Cluster (Ballycroy, Mayo)
Neolithic to Iron Age (Céide to La Tène) · Mayo Neolithic to Iron Age
Atlantic blanket bog trackway cluster (35 m asl, 54°07′12″N 09°27′00″W 54.12,-9.45 Ballycroy Owenduff) within Wild Nephin Ballycroy National Park, Neolithic to Iron Age (3700-200 BCE) 7 toghers on…
🇮🇪 Ireland · Submerged site
Brasil Island (Second Brasil) – Phantom South of Hy-Brasil
Portolan phantom (1325–1450) · Catalan–Italian cartography
Southern Brasil rock phantom at 51°N 16°W – second Brasil duplication south of Hy-Brasil, Porcupine plain.
🇮🇪 Ireland · Earthwork
Dún Aonghasa
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
Cahercommaun Triple Ringfort
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
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
Lough Gur Stone Circle (Grange)
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 · Temple complex
Glendalough Monastic City
Early Medieval (c.590–1398 CE) · Early Christian Gaelic (Anchorite tradition)
Wicklow glacial valley monastic city (6th century St Kevin) with 33 m round tower, medieval churches and double lakes.
🇮🇪 Ireland · Megalith
Carrowmore — Listoghil Central Tomb
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 · Phantom island
Hy-Brasil (Uí Bhreasail) – Phantom Island
Medieval to early modern cartography (1325 – 1873 charted; legend 7th c. Irish immram) · Irish immram myth / Iberian cartography
Circular 51°N 17°W phantom west of Galway on maps 1325–1873 – seven-year appearing immortal isle.
🇮🇪 Ireland · Megalith
Céide Fields
Early to Middle Neolithic · Early Neolithic Ireland (Céide Ware)
10 km² Neolithic field walls and tombs preserved under blanket bog — world's oldest enclosed landscape, c.3500 BCE.