Megalithic tomb - wedge tomb, Carrownaganonagh, Co. Donegal
Hidden among the gentle slopes southeast of a tributary of the Bunlin River in County Donegal lies an ancient wedge tomb that has somehow escaped inclusion on any Ordnance Survey map.
Megalithic tomb - wedge tomb, Carrownaganonagh, Co. Donegal
The monument sits about 100 metres from the waterway, which eventually flows into Mulroy Bay some 3.2 kilometres to the northeast. While the immediate surroundings offer decent pasture land, the broader landscape is dotted with exposed rock outcrops and patches of light peat. The hill range stretching north from Lough Salt Mountain, just 2.5 kilometres away, forms a natural barrier that limits views to the northwest.
This megalithic structure faces west-southwest and stretches four metres in length, divided by a tall septal stone into two distinct sections: a partially roofed entrance portico and a fully covered main chamber. The tomb remains in reasonable condition, with much of its original construction intact. A substantial cairn of sizeable stones, layered beneath about 30 centimetres of earth, envelops the structure on both sides and covers much of the roof. This mound, measuring 4.2 metres square and rising 1.5 metres high, has become grass-covered along the southern edge and top of the gallery, helping it blend into the landscape.
The architectural details reveal sophisticated prehistoric construction techniques. The portico, roughly 1.3 metres long, is largely buried under cairn material, though the northern side slab remains visible at 0.7 metres high. A thick roofstone partially covers this entrance area, resting on the septal stone that completely blocks access to the main chamber; an unusual feature that likely held ritual significance. The main chamber itself narrows from 1.15 metres wide near the entrance to just 0.7 metres at its eastern end, where the backstone is notably absent. Two stones form each side wall, supporting a single roofstone that spans the entire 2.5 metre length of the chamber. Additional structural elements include a buttress stone set perpendicular to the north portico wall and remnants of outer walling, including several prostrate slabs that may have originally stood upright as part of the tomb’s external framework.





