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Dyffryn Mymbyr cairn circle is a prehistoric ritual monument comprising a ring of stone cairns set upon the Caradoc Rocks, a formation of mudstone, siltstone and sandstone that underpins this part of Wales. The circle belongs to a Bronze Age tradition of monument-building that flourished across Britain from around 2000 BC onwards, though its precise date remains uncertain. The stony bedrock provided ready material for the cairn construction, and the elevated position would have commanded views across the surrounding landscape, typical of such ceremonial sites.
The monument's arrangement of cairns suggests a focus for gathering and ritual activity in the prehistoric period. Cairn circles served various functions including burial, territorial marking and ceremonial gathering, though the specific purpose here cannot be determined without excavation. The geology of the site—with its exposed Caradocian rocks—would have made quarrying stone relatively straightforward for the monument's builders.
Dyffryn Mymbyr cairn circle is protected as a scheduled monument by Cadw, the Welsh heritage body, under reference CN372. This protection reflects its significance as evidence of Bronze Age settlement patterns and ritual practice in the Welsh landscape.
Dyffryn Mymbyr cairn circle is a scheduled monument protected by Cadw under reference CN372. View the official record →
Dyffryn Mymbyr cairn circle is a prehistoric ritual monument comprising a ring of stone cairns set upon the Caradoc Rocks, a formation of mudstone, siltstone and sandstone that underpins this part of Wales. It is designated a Scheduled Ancient Monument by Cadw under reference CN372.
Dyffryn Mymbyr cairn circle dates from the prehistoric period, and is classified as a cairn circle. It is one of over 32,000 scheduled monuments protected across the UK.
Dyffryn Mymbyr cairn circle 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 CN372.
Several scheduled monuments lie within 10 km, including Cwm Dyli Ancient Village (3.9 km), Hut Circle Settlement North of Cwm Dyli Power Station (4 km), Hut circles NW of Tyn-y-Ddol (4.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Dyffryn Mymbyr cairn circle'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.
Dyffryn Mymbyr cairn circle stands on Caradoc Rocks (Undifferentiated), bedrock that formed in the Caradocian. The rock here is mudstone, siltstone and sandstone.