This souterrain, a type of artificial cave system used for storage and refuge, was accidentally discovered years ago when someone stumbled upon an opening in its roof; possibly the original entrance. Built into the upper slope of the hill, the monument consists of four interconnected chambers stretching approximately 10 to 12 metres in a north-west to south-east orientation.

The main chamber is particularly impressive, featuring a beehive-shaped design constructed from rounded stones and topped with substantial stone lintels. From here, three additional chambers branch off to the south and south-west, each accessible through narrow creepways that would have required visitors to crawl through on hands and knees. Whilst all four chambers share similar construction techniques, they vary in their dimensions and exact shapes, suggesting they may have served different purposes within the complex.

In 2004, archaeologists conducted test excavations around the souterrain as part of preparations for a residential development. Though the dig, led by Dominic Delany & Associates, revealed no additional archaeological materials in the immediate vicinity, the investigation helped establish appropriate protective measures for the monument. The development plans now include a 25-metre buffer zone around the souterrain, ensuring this fascinating piece of Ireland’s hidden heritage remains undisturbed for future generations to study and appreciate.