Dunluce Castle is a ruined medieval castle in Northern Ireland, located on the edge of a basalt outcrop between Portballintrae and Portrush in County Antrim. Surrounded by extremely steep drops on either side, it is accessible via a bridge connecting it to the mainland (just visible left.) Richard Óg de Burgh, 2nd Earl of Ulster, built the first castle at Dunluce in the 13th century. Later it served as the seat of the Earl of Antrim until the impoverishment of the MacDonnells in 1690, following the Battle of the Boyne.

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