No mound, no hollow, no crop mark betrays them. The only record of what lies below comes from a 1939 observation describing at least two oval chambers connected by a passage barely wide enough to crawl through, their walls built in a beehive style and their ceilings laid with large flat stones.

The structure is a souterrain, an underground passage or chamber system, typically stone-lined, that was commonly built during the early medieval period in Ireland. Their exact purposes are still debated, but they were most likely used for cool storage, refuge, or both, and they are often found in association with ringforts. The Barrahaurin example was recorded by Hartnett in 1939, who noted the corbelled, beehive-like walling of the chambers, a construction technique that distributes the weight of the roof without the need for mortar. By the time the site was catalogued in the Archaeological Inventory of County Cork in 1997, there was no visible surface trace remaining, which is itself a common fate for souterrains as the land above them is ploughed, grazed, or simply left to settle over centuries.

What makes this particular site quietly thought-provoking is less what it contains than what it has become: a place that exists almost entirely in a single mid-twentieth century description. The pasture above the Dripsey continues to be grazed, the slope faces west as it always did, and below some unremarkable patch of ground, two oval rooms connected by a crawlway may still be intact, unvisited and unmarked.