Dunluce Castle from the shore looks completely different, with green-covered rock pools leading the eye to the ruins. Dunluce Castle is a picturesque castle perched on the edge of a basalt outcropping in County Antrim, Northern Ireland. The current ruins mostly date back to the 16th and 17th centuries when it became the seat of Clan MacDonnell. Like the Dark Hedges, this location gained further fame as the filming location for House Greyjoy’s castle, Pyke, in Game of Thrones.