Pen-y-Crug Iron Age Hillfort. This large hillfort enclosure is set on top of Pen-y-crug, a hill in the Brecon Beacons National Park (Welsh: Parc Cenedlaethol Bannau Brycheiniog) in the county of Powys, Wales (Welsh: Sir Powys, Cymru). This steep hill gives commanding views of the surrounding area. There are a set of defensive ditches and ramparts around the summit with the inner being of impressive height. The site is off the B4601 road out of Brecon (Welsh: Aberhonddu).
Image: Iron Age Hillfort, Pen-y-Crug. Image courtesy of RCAHW - Royal Commission on the Ancient and Historical Monuments of Wales. (Welsh: CBHC - Comisiwn Brenhinol Henebion Cymru).