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Carneddau Hengwm Long Cairns is a prehistoric chambered long cairn located in Wales and protected as a scheduled monument by Cadw under reference ME007. The monument sits upon Lower Cambrian bedrock composed of interbedded sandstone and conglomerate, geological formations dating to the Early Cambrian period. This ancient stone foundation provided the builders of the cairn with accessible stone resources nearby, which would have been essential for constructing this substantial prehistoric structure.
Long cairns of this type were built during the Neolithic period, serving as communal burial monuments for multiple individuals. The chambered form indicates an internal stone burial chamber, which would have been accessible for periodic ceremonial use and the deposition of the dead. The monument's presence in the Welsh landscape reflects the spread of megalithic burial practices across Britain during the fourth and third millennia before the present.
The cairn survives as a testament to Neolithic communities' investment in monumental construction and their beliefs concerning death and commemoration. The site's location within the Welsh uplands demonstrates how Neolithic peoples engaged with diverse landscapes, establishing permanent ritual centres that would have served their communities for generations and remained significant in the cultural memory of the regions they inhabited.
Carneddau Hengwm Long Cairns is a scheduled monument protected by Cadw under reference ME007. View the official record →
Carneddau Hengwm Long Cairns is a prehistoric chambered long cairn located in Wales and protected as a scheduled monument by Cadw under reference ME007.
Carneddau Hengwm Long Cairns dates from the prehistoric period, and is classified as a chambered long cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Carneddau Hengwm Long Cairns is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is ME007.
Several scheduled monuments lie within 10 km, including Cyfannedd-Fach Homestead (8 km), Bron-Llety-Ifan cairns and cup-marked rock (8.2 km), Fairbourne Anti-invasion Defences (8.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Carneddau Hengwm Long Cairns's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Carneddau Hengwm Long Cairns stands on Lower Cambrian Rocks (Undifferentiated), bedrock that formed in the Early Cambrian. The rock here is sandstone and conglomerate, interbedded.