 Roofless and with unusually high squared gables it cuts a striking, almost oriental silhouette against the skyline, even though internally it measures a tiny 3.2 m x 2.1 m. It is formed from massive blocks of stone (a single slab forms a half of one side), and is bonded by mortar and very careful fitting.Its thick walls are pierced by a traveated (three beam) narrow north doorway with inclining jambs, and cut away lintel.A small east window with a single stone semi-circular head keeps a vigil towards the mainland of Ireland.