What makes this particular spot unusual is not just the fort itself but the density of ancient occupation around it: within a few dozen metres there is a second promontory fort to the north-northwest and a megalithic tomb to the southeast, suggesting that this exposed, wind-scoured corner of bog and coarse grazing was once considered worth defending and commemorating.

A promontory fort is, in essence, a natural headland converted into an enclosure by cutting it off from the mainland with a bank and ditch across the narrowest point, the isthmus, so that the sea does the defensive work on the remaining sides. Here, the headland faces northwest and measures 28 metres in length and 18 metres at its widest. The earthen bank that once sealed it has been worn down to a grassy mound just 0.7 metres high and 3.3 metres wide, but three long upright stone slabs survive along its outer face near the northeastern edge. These suggest the bank was originally revetted, meaning it was faced with stone to hold the earth in place and give it a more formidable appearance. A further upright runs at right angles to this facing and may once have marked the entrance. The external ditch, 6 metres wide and a metre deep, is best preserved at either end; there is no clear causeway crossing it, only a faint rise near the middle. At the far tip of the interior a small knoll is isolated by its own short ditch, 4 metres wide and 2 metres long, though its purpose is not clear. Just offshore, an oval island is accessible only at low tide and may have been connected to this site or represented a separate, related enclosure.

The surrounding landscape gives some sense of what this place would have felt like to whoever built and used it. The land is poor, flat bog and rough grazing, with steep cliffs on either side of the headland and open Atlantic water beyond. That combination of natural defensibility and strategic view out to the northwest would have made it a logical choice for a fortified position, even if the precise period of its use and the people who built it remain unknown.