Castell Dinas is a hillfort and castle in southern Powys, Wales. At 450 m it has the highest castle in England and Wales. It is positioned to defend the Rhiangoll pass between Talgarth and Crickhowell.
Wikipedia https://en.wikipedia.org/wiki/Castell_Dinas
Address LD3 0, United Kingdom
Coordinates 51°57'47.55" N -3°11'47.874" E