© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Castell Felin-Ganol is a prehistoric promontory fort situated on a naturally defensive ridge in inland Wales. The monument occupies a geological position of inherent advantage, built upon Ashgill Rocks of undifferentiated character—mudstone, siltstone and sandstone deposits that formed during the Ashgill period. This bedrock provided a naturally elevated platform from which defenders could command views across the surrounding landscape.
The fort exploits the topographical advantages of its promontory setting, a recognised settlement strategy from the Iron Age and earlier periods. The ridge formation itself, combined with defensive earthwork construction, would have presented a formidable obstacle to approach from lower ground. The geological composition of the bedrock—relatively stable sedimentary strata—offered suitable foundations for ramparts and internal structures.
Castell Felin-Ganol is protected as a scheduled monument under Cadw's register, reference PE170, recognising its archaeological significance as a prehistoric fortified settlement. The site remains an important example of promontory fort architecture, a defensive type well-represented across Wales. Its preservation allows study of Iron Age settlement patterns and the relationship between natural topography and human fortification strategy in prehistoric Wales.
Castell Felin-Ganol is a scheduled monument protected by Cadw under reference PE170. View the official record →
Castell Felin-Ganol is a prehistoric promontory fort situated on a naturally defensive ridge in inland Wales. It is designated a Scheduled Ancient Monument by Cadw under reference PE170.
Castell Felin-Ganol dates from the prehistoric period, and is classified as a promontory fort - inland. It is one of over 32,000 scheduled monuments protected across the UK.
Castell Felin-Ganol 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 PE170.
Several scheduled monuments lie within 10 km, including Corn Drying Kiln 130m E of Mirianog-Ganol (8.2 km), Round Barrows on Summit of Freni Fawr (8.3 km), Round Barrow on E Slope of Freni Fawr (8.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castell Felin-Ganol'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 Felin-Ganol stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.