Located on Patrick’s Hill and above a stone outcrop in the village of Dunfanaghy, County Donegal, this crenellated little tower’s origins are unclear. While it does not appear on the original Ordnance Survey map of the late 1830s, it is shown on Griffith’s Valuation map a couple of decades later. Was it constructed as a folly or a lookout post with views across the local Sheephaven Bay? And who commissioned it? Set on a plinth and of rubble stone, the structure has a pointed arch opening on the west side and square-headed window opening to the north, with an infilled opening on the south face. It holds one small room: what can its purpose have been?