Castell Coch consists of two lines of ditch and bank 25m apart, the outer bank revetted by a modern wall, cut off the isthmus of a promontory in the region of 120m by 100m (in 1966). Inturning of the inner bank suggests that the present entrance is original.
An modern 'view-point shelter' is depicted on the NAR survey plan.

(source Os495card; SM83SE9)

RCAHMW AP94-CS 0107-108
RCAHMW AP945010/43-4

J.Wiles 14.05.02