Cairnburgh Castle

Cairnburgh Castle stands on two small islands at the northern end of the Treshnish Isles, where Loch Tuath meets the sea north of Iona. The islands, Cairn na Burgh Mòr and Cairn na Burgh Beag, hold the ruins of one of Britain’s most remote forts. Its defences stretch across both islands, with the larger holding a barrack block, chapel, courtyard and guard-house. The smaller island contains another guard-house and a well. The castle began as a Viking fortress called Kiarnaborg, first recorded in 1249. The castle passed through many hands: Clan MacDougall owned it from 1249 to 1269, then the Crown took it during the Wars of Scottish Independence. Clan MacDonald briefly held it before Clan MacLean became its longest owners. Hector Maclean was made constable in 1409. In 1504 James IV besieged it when the MacLeans backed Domhnall Dubh. Cromwell’s army burned it in the 1650s, destroying manuscripts brought from Iona. Visitors find grass-grown ruins on steep cliffs with views over the Atlantic. The barrack block and chapel remain recognisable on the larger island. The smaller island’s guard-house and well can still be seen. The site shows signs of repeated sieges and fires. The wind carries salt spray across the walls. No modern buildings stand nearby, only seabirds and the sound of waves.