The stone castle consists of a gate tower, curtain walls and two corner towers dating from the 1280s. The castle rooms are furnished and some house exhibitions. Built in the early 18th century in the Queen Anne style, Damer House is an example of pre-Palladian architecture. One of the rooms is furnished in period style. Within the complex, there is a restored mill displaying original St. Cronan's high cross and pillar stone. As this site is managed by the OPW, school tour visits are permitted free of charge provided certain conditions are met.