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Nant y Llyn Stone Row is a prehistoric stone alignment located in Wales, protected as a scheduled monument by Cadw under reference RD197. The monument consists of stones arranged in linear formation, a characteristic type of ritual or territorial marker erected by Neolithic or Bronze Age communities. Stone rows of this kind are found across upland Britain and typically served purposes connected to ceremonial practice, movement across the landscape, or marking significant boundaries.
The site is situated upon bedrock of the Llandovery Rocks, an undifferentiated sequence of mudstone, siltstone and sandstone laid down during the Silurian period. This geology would have provided the raw materials for the alignment itself, with suitable stones gathered from the immediate landscape or extracted from weathered outcrops. The mixed composition of the underlying strata means that stones of varying size and character would have been available to the monument's builders.
The alignment takes its name from the nearby valley feature, Nant y Llyn, indicating its position within a defined landscape unit. Such monuments often occupy visually or topographically significant locations, and their presence continues to shape modern understanding of how prehistoric peoples organised and perceived their environment. The row remains a material testimony to the ceremonial and organisational complexity of prehistoric Welsh communities.
Nant y Llyn Stone Row is a scheduled monument protected by Cadw under reference RD197. View the official record →
Nant y Llyn Stone Row is a prehistoric stone alignment located in Wales, protected as a scheduled monument by Cadw under reference RD197.
Nant y Llyn Stone Row dates from the prehistoric period, and is classified as a stone alignment. It is one of over 32,000 scheduled monuments protected across the UK.
Nant y Llyn Stone Row 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 RD197.
Several scheduled monuments lie within 10 km, including Cairns and Standing Stones on Carnau Cefn-y-Ffordd (8.8 km), Saith-Maen Standing Stones (8.8 km), Hafotau Settlement on Bryn Melys (8.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Nant y Llyn Stone Row'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.
Nant y Llyn Stone Row stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.