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Two Cairns on Traeth Mawr is a prehistoric burial monument in Wales, protected by Cadw. The site comprises two substantial stone cairns built upon bedrock of Lower Devonian mudstone, siltstone and sandstone, laid down in the Early Devonian period. This geology, exposed across the coastal landscape, would have provided accessible stone for cairn construction, making the location practical for Bronze Age or Neolithic communities seeking to establish a burial place on the tidal flats of Traeth Mawr.
The cairns represent a deliberate act of monumentalisation within the broader tradition of stone-built sepulchres found throughout prehistoric Wales. Their siting on the foreshore is unusual, reflecting either changing coastal conditions since their construction or a specific cultural choice to locate the dead in a liminal zone between land and sea. The Lower Devonian bedrock, though weathered and fractured by natural processes, would have enabled the extraction of stone suitable for dry-stone cairn building.
These monuments endure as evidence of funerary practice and territorial presence among prehistoric communities. Without documented excavation records, the precise chronology and ritual contents of the cairns remain unknown, yet their survival on the Traeth Mawr foreshore attests to their original substantial construction and their cultural significance to those who raised them.
Two Cairns on Traeth Mawr is a scheduled monument protected by Cadw under reference BR227. View the official record →
Two Cairns on Traeth Mawr is a prehistoric burial monument in Wales, protected by Cadw. It is designated a Scheduled Ancient Monument by Cadw under reference BR227.
Two Cairns on Traeth Mawr dates from the prehistoric period, and is classified as a cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Two Cairns on Traeth Mawr 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 BR227.
Several scheduled monuments lie within 10 km, including Nant Mawr Round Cairn (6.2 km), Storey Arms Anti-invasion Defences (6.6 km), Maen Llia Stone (7.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Two Cairns on Traeth Mawr'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.
Two Cairns on Traeth Mawr stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is mudstone, siltstone and sandstone.