Cefn yr Ogof is the highest point of the hill to the west of Gwrych Castle near Abergele and Llanddulas. The entire hillside is privately owned by the Gwrych Castle Estate. It is 204 m (669 ft) high, with views towards the Clwydian Hills, Denbigh Moors, (Mynydd Hiraethog) Snowdonia, the Great Orme, Anglesey and the Dulas valley. The name refers to the caves located on the hill.