Caer Drewyn is an early Iron Age hillfort to the north of the town of Corwen, Denbighshire (Grid reference SJ 08769 44411). It has a large stone rampart with entrances on the west and north sides; there is a guard chamber within the north-east entrance, and it has a deep defensive ditch.[1]
- ^ A short guide to Caer Drewyn Hillfort; accessed 3 March 2014