This cashel, a type of stone fort common in early medieval Ireland, consists of a subcircular enclosure once defined by a substantial stone wall. Though time has taken its toll and much of the wall has collapsed, sections still stand, particularly where a second defensive wall can be traced in the southwestern sector. A modern field fence now runs along the northeastern edge, somewhat obscuring the original monument's boundaries, whilst a gap in the southern wall may mark the original entrance, though centuries of decay make this impossible to confirm.

The real treasure of Dunacludean lies beneath the surface, where an extensive souterrain system weaves through the earth. This underground network, accessible through three openings (none of which appear to be original), features a stone-built main passage running east to west that opens into a sizeable chamber just west of the cashel's centre. At its deepest point, the floor plunges 1.5 metres below ground level, where subsidiary passages branch off to the east and west. These souterrains, common in Irish ringforts and cashels, likely served multiple purposes; storage for food and valuables, refuge during raids, or perhaps ritual functions we can only speculate about today.

Above ground, the remains of two circular hut foundations flank the souterrain to the northeast and southwest, suggesting this was once a thriving domestic complex. A large stone bearing a circular depression in the eastern section hints at daily activities, possibly grain processing or other domestic tasks. Beyond the cashel's western edge, traces of what may be an ancient field system speak to the agricultural life that sustained this community. Together with the nearby hut site at Creevy, these monuments paint a picture of a landscape that has been continuously inhabited and worked for millennia, each generation leaving its mark on this commanding spot overlooking the wild Atlantic coast.