What looks at first like a rough scatter of field stones is actually a collapsed circular hut, built using corbelled drystone construction, a technique in which stones are layered inward and upward without mortar until they meet overhead to form a roof. The terrace itself is revetted, meaning its edges are faced with stone to hold the ground level steady, and it measures 14.5 metres long by 9.5 metres wide. The hut's walls, now largely buried under their own collapse, were around 1.8 metres thick, which gives some sense of the solidity that was originally intended. The internal diameter runs to roughly five metres, and what survives of the wall above the collapse stands only about a quarter of a metre high. To the east, a dense spread of stones may indicate the foundations of a second structure, though nothing definitive has been established.

The more striking feature lies in the southern face of the terrace, near its western end, where a lintelled entrance opens into a souterrain. A souterrain is an underground passage built from stone, typically associated with early medieval settlement in Ireland, and used variously for storage, refuge, or both. This one is carefully made. The entrance, facing east-south-east, is just 75 centimetres high and 65 centimetres wide, and leads into a passage that runs north-west for 3.3 metres before curving gently northward for a further six metres. The passage averages 1.2 metres in height and one metre in width throughout. Midway along its length, the passage narrows sharply into a creepway, a deliberately low and tight section that would have forced anyone moving through it to crawl, flanked by four pairs of upright stone slabs known as orthostats. This creepway measures 1.4 metres long, 60 centimetres high, and just 50 centimetres wide. Collapse at the northern end prevented full investigation of where the passage ultimately leads.