Description: This photograph shows the boundary of Castell Brogyntyn which can be found within the grounds of Brogyntyn Park. The earthwork fort is thought to have been built by Brogyntyn himself, a son of Prince Owen Madre of Wales. The site is placed in a strong defensive position and has very large artificial ramparts. It also has a striking rock cut tunnel some 80 meters long with entrances in the ringwork ditch. It was probably built either as part of an elaborate landscape walk through the parkland or as part of a water distribution system, perhaps associated with the ornamental lakes below the castle to the north west. (Photograph by Dr Paul Stamper).