Bryn y Castell is an Iron Age settlement / 'mini' hillfort with a stone rampart in the North West Walian tradition. Excavations from 1979 to 1985 revealed iron-working activity, both smelting and smithing, until the Roman occupation and for a brief period after the Romans left Wales in a hut just to the north.

Both stone and wooden round huts were found during excavation along with modifications to the site spanning many years including a change of entrance on the northern side.

The walls and stone huts have been very tastefully restored especially the northern hut with its overlapping wall built to accommodate the industrial activities carried out here. Marker stones indicate where wooden gate and hut posts were found and areas of discrete loose stone paving show the bases of wooden huts.

Location: Gwynedd, Wales
Grid Ref: SH728429