This is a prehistoric cairn, a type of monument built from piled stones, often over a burial, and found across Ireland from the Neolithic period onward. What makes this one quietly compelling is the precision that survives beneath its overgrown surface: a roughly oval base measuring 8.7 metres north to south and 10.3 metres east to west, narrowing to a flatter top of around 5.1 metres, with a height that varies between 0.8 and 1.6 metres depending on where you stand.

The structure retains clear architectural detail despite its age and vegetation. Kerbstones, the upright or edging stones used to contain and define a cairn's body, survive along the northern side, with a curving line of them also marking the upper southern edge. The interior is notably flat, sitting at a slight drop below the level of the encircling kerb, which suggests the original design involved a defined interior space rather than a simple heap of rubble. Several large flat boulders lie within this space and may originally have served as lintels, the horizontal covering stones of a burial chamber, though a number of them are now loose and displaced. Whether a chamber once lay beneath them is not recorded.