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Castle Heli Mound is a prehistoric round barrow situated in Wales and protected by Cadw under reference CM088. The monument rises from bedrock composed of Pridoli rocks—undifferentiated mudstone, siltstone and sandstone formed during the Pridoli period. These fine-grained deposits, typical of ancient marine environments, underlie the mound and would have presented a stable foundation for its construction. Round barrows of this type generally date to the Bronze Age and represent burial monuments, though their precise chronology and function often varied regionally across Wales and Britain. Such earthworks typically enclosed cremated or inhumed remains, sometimes with grave goods, though the specific contents and construction sequence of Castle Heli Mound remain undocumented in available records. The monument's survival, now under heritage protection, allows it to be studied as part of the landscape archaeology of its region, contributing to broader understanding of prehistoric burial practices and settlement patterns in Wales.
Castle Heli Mound is a scheduled monument protected by Cadw under reference CM088. View the official record →
Castle Heli Mound is a prehistoric round barrow situated in Wales and protected by Cadw under reference CM088.
Castle Heli Mound dates from the prehistoric period, and is classified as a round barrow. It is one of over 32,000 scheduled monuments protected across the UK.
Castle Heli Mound 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 CM088.
Several scheduled monuments lie within 10 km, including The Castle, Woodreefe (2.2 km), Top Castle (2.8 km), Trelessy Defended Enclosure (3.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castle Heli Mound'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.
Castle Heli Mound stands on Pridoli Rocks (Undifferentiated), bedrock that formed in the Pridoli. The rock here is mudstone, siltstone and sandstone.