The castle consisted of two distinct parts; a keep of an irregular shape on the top of a precipitous rock and other buildings at a lower level. The keep walls are about five feet thick and the vaults on the basement are well preserved, however most of the superstructure is entirely demolished. The keep represents the original castle, much altered. The central portion of the castle may be 15th century and was intended to form a defence to the access into the keep. The additional buildings are of a later date and contain two kitchens on the ground level, one for the castle and the other for the retainers. To the north-east stands a detached wall which may have led to a gateway. A drawbridge may have stood nearby and the chapel may have been located against the thick wall of the central part of the castle. Beneath the castle is a cavern called the Browney's Cave which may have been a sally-port: a secret tunnel leading to the castle. In 1429 a meeting took place at Dunure between James Campbell, representing King James I of Scotland and John Mor MacDonald, representing the Lord of the Isles. Violence broke out and MacDonald was killed. James I's efforts to contain the outrage of the Lords of the Isles by executing Campbell did not prevent a subsequent uprising by them. For three days from 4 August 1563, Mary, Queen of Scots, stayed at Dunure Castle on her Royal tour down the west coast to
Glenluce Abbey then on to
Whithorn Priory. She was the guest of Gilbert Kennedy, the 4th Earl of Cassillis.
Demise The castle's demise began in the mid-17th century. By 1694, the castle was described as "wholly ruined". It is not clear whether this can be linked to the Civil War period, although local tradition suggests that Dunure had been burnt and/or blown up. A major collapse of the south-eastern part of the keep could perhaps be linked to such activity. Recovery of building materials for the construction of the Cromwellian citadel in Ayr may also account for its ruination, as occurred at
Ardrossan Castle. Much evidence exists for the systematic dismantling of the structure for recoverable building materials including the orderly removal of slates, stone, and glass. The windows were dismantled and comprehensively stripped of their lead. Remains of a localised fire and associated deposits of coal suggested that smelting of the lead took place within the room. Those dismantling the castle seem to have occupied part of the structure during their work. The ruin subsequently saw periodic robbing of its sandstone dressings. A range of castle buildings to the south of Area 4 remained in occupation until c. 1860. Census records and reuse of some rooms demonstrate that some of the occupants were fishermen. A large midden of mussel shell gave evidence for the baiting of cod lines. Domestic refuse of the later 18th and early to mid-19th century was also recovered. The only relatively late recorded military action at Dunure consists of a short siege in 1570. A Civil War action or slighting is a further possibility, although the castle may have been abandoned by that time. The route of a stone-lined water course was located at the south end of the trench as it ran into the entrance of the Area 4 kitchen range. Groundworks to the south of the ruins located a further, well preserved section of the same water course.
Present day The castle has been excavated and consolidated, making safe the public access to the area. The castle dominates the Kennedy Park, which has a number of facilities for visitors. There are also said to be secret
Ley tunnels which connect Dunure Castle to
Greenan Castle further north. ==Micro-history==