© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Castell y Garn is a prehistoric ring cairn situated in Wales, designated and protected by Cadw under reference RD114. The monument belongs to a class of funerary structures built during the Neolithic and Bronze Age periods, typically comprising a circular mound of stones with a ring-like boundary or ditch, often used for communal or family burial.
The cairn sits upon bedrock of Llandovery Rocks, an undifferentiated formation of sandstone and conglomerate laid down during the Ordovician Llandovery period. This geology would have offered workable stone for construction, with the interbedded sandstone and conglomerate naturally fractured and weathered into blocks suitable for cairn building. The local stone sources would have determined both the monument's form and the labour investment required to construct it.
Ring cairns of this type typically date from around 3000 to 1500 BCE and were built as enduring territorial markers as well as burial monuments. Such structures often stood prominent in their landscapes, visible from considerable distances, which combined practical commemorative function with ritual or social significance for the communities that built and maintained them.
Castell y Garn is a scheduled monument protected by Cadw under reference RD114. View the official record →
Castell y Garn is a prehistoric ring cairn situated in Wales, designated and protected by Cadw under reference RD114.
Castell y Garn dates from the prehistoric period, and is classified as a ring cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Castell y Garn 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 RD114.
Several scheduled monuments lie within 10 km, including Creggin Round Barrow (4.8 km), Llyn Dwr Cairn (4.8 km), Llyn Dwr Standing Stone (4.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castell y Garn'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.
Castell y Garn stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is sandstone and conglomerate, interbedded.