Mill Wood Castle is a ditched mound, c.32m in diameter and 5.0m high, is set at the end of a slight natural, wooded, promontory at the confluence of two streams. To the north a bank and ditch cut across the promontory, segregating an enclosure, about 34m by 55m.
The site lies about 400m to the east of Dingestow Castle (NPRN 306496).
OS record card SO41SE16.
RCAHMW air photo: 45054/44.