To enter this subterranean space, visitors must navigate a narrow tunnel on the south side, measuring roughly 75 centimetres wide and just 60 centimetres high; a tight squeeze that would have been deliberately designed to make unwelcome entry difficult. This cramped passageway opens into a more spacious chamber measuring 3.3 metres by approximately 1.3 metres, with walls rising to 1.4 metres in height.

The construction of this souterrain showcases the building techniques of early medieval Ireland. The walls are built using drystone construction, carefully assembled without mortar and set against the cut rock face. Above, the roof consists of flat flagstones laid across corbelled walls, a technique where each course of stones projects slightly inward until they meet at the top, creating a strong, self-supporting structure. A second, smaller opening leads off to the north, suggesting this may have been part of a more extensive underground network or provided an emergency escape route.

Souterrains like this one were typically built between the 6th and 12th centuries AD and served multiple purposes; they may have been used for food storage, taking advantage of the cool, stable underground temperatures, or as refuges during raids. The fact that this example sits beneath productive farmland is no coincidence, as these structures were often associated with prosperous settlements where valuable goods and foodstuffs needed protection.