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Two Burial Chambers on Graig Fawr is a prehistoric chambered tomb located in Wales. The monument consists of two distinct burial chambers constructed from stone, characteristic of the passage tomb tradition that flourished across Britain and Ireland during the Neolithic period. The chambers are situated on bedrock formed from the South Wales Upper Coal Measures, a geological sequence dominated by mudstone, siltstone and sandstone laid down during the Westphalian epoch of the Carboniferous period. This solid foundation of ancient sedimentary rock provided a stable base for the monument's construction.
The site's location on Graig Fawr reflects the Neolithic preference for elevated positions commanding the surrounding landscape. The ironstone and ferricrete deposits within the local geology may have been accessible to the tomb's builders, though the primary construction material was stone quarried or gathered from the immediate vicinity. The dual chamber arrangement suggests multiple phases of use or construction, a pattern observed at many comparable Welsh Neolithic monuments.
The monument is protected by Cadw, the Welsh heritage organisation, under the reference GM513, ensuring its preservation and recognition as a significant archaeological asset. Its survival on the Welsh uplands testifies to the enduring character of megalithic architecture from this transformative period in human settlement.
Two Burial Chambers on Graig Fawr is a scheduled monument protected by Cadw under reference GM513. View the official record →
Two Burial Chambers on Graig Fawr is a prehistoric chambered tomb located in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference GM513.
Two Burial Chambers on Graig Fawr dates from the prehistoric period, and is classified as a chambered tomb. It is one of over 32,000 scheduled monuments protected across the UK.
Two Burial Chambers on Graig Fawr 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 GM513.
Several scheduled monuments lie within 10 km, including Remains of Astronomical Observatory at Penllergaer (7.2 km), Melin Mynach, Gorseinon (7.3 km), Penllergaer orchideous house (7.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Two Burial Chambers on Graig Fawr'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 Burial Chambers on Graig Fawr stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.