This five-storey rectangular tower, measuring approximately 11.75 metres north to south and 8 metres east to west, survives in partial form today. Whilst the east wall stands to its full original height, minus the battlements, and the south wall reaches to the second floor, the western wall that once stood six feet tall in the 1840s has since collapsed entirely.

The tower’s internal layout reveals the sophisticated defensive and domestic arrangements typical of such structures. Entry was gained through a doorway near the southern end of the western wall, where only the south jamb remains visible. This led to a spiral staircase in the southwest corner, evidenced by curved walling at first-floor level. The ground floor contained a vaulted main chamber and an unlit mural chamber measuring 3.8 by 1.9 metres, whilst upper floors featured various amenities including garderobe chambers, with one shaft still visible through the wall, and windows of increasing elaboration. The second floor boasts a particularly fine window with a wide rectangular light originally divided by mullions, topped with decorative hood moulding.

This Geraldine castle, though granted to St. Ledger in 1567, appears to have remained in Fitzgerald hands until 1655 when it was recorded as a ‘ruined Castle and a Bawne’. Evidence of the bawn, or defensive courtyard wall, can still be traced; a short section protrudes from the external south wall at ground level, and the positioning of the entrance and garderobe exits suggests the bawn occupied the southwestern side of the tower. An ivy-covered wall of uncertain purpose stands 3.2 metres from the southeast corner, with the ruins of what appears to be a 19th-century lime kiln at its northern end, adding another layer to this site’s long history of use and adaptation.