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Llyn Dwr Standing Stone is a prehistoric standing stone located in Wales and protected by Cadw under reference RD160. The monument rises from bedrock of Ashgill age, a geological sequence of mudstone, siltstone and sandstone that underlie the site. These sedimentary rocks, among the oldest in Britain, were laid down during the Ordovician period and provide a stable foundation in an area of undifferentiated Ashgill lithology.
The stone belongs to a tradition of upright monoliths that characterise the Welsh Bronze Age and later prehistoric periods. Such monuments typically served ritual, territorial or commemorative functions within their communities. The exposed location and local geology would have made extraction of stone difficult, suggesting that the effort invested in its erection held considerable significance for those who placed it.
Today, Llyn Dwr Standing Stone remains an important marker of prehistoric activity in the Welsh landscape. Its survival and continued protection reflect both its archaeological value and its role as a physical link to the beliefs and social organisation of ancient communities who inhabited this upland terrain.
Llyn Dwr Standing Stone is a scheduled monument protected by Cadw under reference RD160. View the official record →
Llyn Dwr Standing Stone is a prehistoric standing stone located in Wales and protected by Cadw under reference RD160.
Llyn Dwr Standing Stone dates from the prehistoric period, and is classified as a standing stone. It is one of over 32,000 scheduled monuments protected across the UK.
Llyn Dwr Standing Stone 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 RD160.
Several scheduled monuments lie within 10 km, including Dol-y-Fan Round Cairn (8.7 km), Bongam Bank Round Barrows (8.9 km), Cefnllys Medieval Settlement and Field Systems (9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Llyn Dwr Standing Stone'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.
Llyn Dwr Standing Stone stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.