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Garn Las is a prehistoric platform cairn situated in Wales, protected by Cadw under reference BR339. The monument comprises a raised stone platform, a form of burial structure characteristic of Neolithic and Early Bronze Age communities across upland Britain. Such platforms were constructed by accumulating stones to create a level surface, often marking a place of ceremonial or funerary significance within the landscape.
The cairn sits on bedrock composed of Lower Devonian rocks, consisting of interbedded sandstone and conglomerate formed during the Early Devonian period. This geology has influenced both the availability of building stone and the character of the surrounding terrain, shaping how prehistoric communities exploited and organised this upland setting.
Garn Las contributes to our understanding of how people in prehistoric Wales used their landscape, selecting elevated positions for monuments that would have been visually prominent in their local world. The stone materials available from the underlying geology provided the building blocks for this enduring structure, which has survived millennia to remain a tangible record of ancient ritual and memory.
Garn Las platform cairn is a scheduled monument protected by Cadw under reference BR339. View the official record →
Garn Las is a prehistoric platform cairn situated in Wales, protected by Cadw under reference BR339.
Garn Las platform cairn dates from the prehistoric period, and is classified as a platform cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Garn Las platform cairn 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 BR339.
Several scheduled monuments lie within 10 km, including Burnt Mound South of Fan Hir (6.9 km), Banwen Gwys Round Cairns (7.2 km), Allt Fach Deserted Rural Settlement (7.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Garn Las platform cairn'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.
Garn Las platform cairn stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is sandstone and conglomerate, interbedded.