The main structure is a four-storey rectangular tower house, measuring approximately 7.15 metres east to west and 4.55 metres north to south internally. Built along the northwestern bank of the ancient ringfort, this tower features a pointed vault over its second floor and an ingenious internal layout. Two doorways, positioned one above the other near the western end of the south wall, provide access to the ground and first floors. From the first-floor entrance, straight mural stairs climb through the thick walls to reach the southeast corner of the third floor, whilst a spiral staircase in the same corner continues up to the roof level.

The tower’s defensive and domestic features reveal the priorities of its medieval builders. A mural garderobe chamber, essentially a built-in toilet, occupies space within the north wall at first-floor level, with its chute exiting at the base of the east wall. The windows tell their own story of changing architectural styles; ground-floor openings feature round-headed arches, whilst upper levels appear to have square-headed lights, though many are now poorly preserved. The third-floor window embrasures were fitted with stone seats, allowing occupants to sit comfortably whilst keeping watch. The exterior walls are peppered with putlog holes, evidence of the wooden scaffolding used during construction, and the base batter that once strengthened the tower’s foundation has since been removed.

To the south, a second, smaller mural tower rises three storeys along the ringfort’s defensive bank. This rectangular structure, measuring just 2.8 metres by 1.32 metres internally, is now heavily clad in ivy but retains fascinating architectural details. Like its larger companion, it features a pointed vault, this one with wicker centering over the second floor. Blocked openings in the north and south walls at first-floor level suggest alterations over time, whilst splayed window openings at second-floor level, though obscured by vegetation, would have provided light and defensive positions. A spiral staircase in the southwest corner above the second floor gives access to the roof. Known locally as ‘Whites Castle’, this complex was an O’Mahony stronghold, representing centuries of Irish castle building tradition adapted to incorporate the defensive advantages of a much older ringfort site.