A shell midden, essentially a concentrated accumulation of food waste left behind by people eating shellfish at or near the same spot over time, had been pressed into the sand-face at Dooaghs, sitting about half a metre below the surface. It measured just 1.4 metres in length and no more than a tenth of a metre thick, a modest remnant by any standard, yet its composition told a clear story: cockle, mussel, and limpet shells, the everyday diet of people living close to an Irish estuary or coastal inlet.

By 1994 the midden had been eroded away entirely, eaten by the same shoreline processes that had presumably exposed it in the first place. Its existence is known through survey work compiled by A. O'Sullivan and J. Sheehan for their archaeological survey of the Iveragh Peninsula, published by Cork University Press in 1996. The site lies roughly 1.2 kilometres south of another recorded monument in the same area, placing it within a wider coastal landscape that saw sustained human activity across centuries. Middens like this one are among the more ephemeral categories of archaeological site; without deliberate excavation or the luck of burial in stable conditions, coastal erosion tends to reclaim them quietly and completely.

There is nothing to see at Dooaghs now. The deposit is gone, and what remains is the shoreline itself, the spit, and the ordinary tidal geography of Castlemaine Harbour. The interest lies less in visiting than in the fact that such a small scatter of shells, half a metre down in coastal sand, was noticed, recorded, and placed in its landscape context before it disappeared.