Also known locally as the Castle of Rye Hill, this fortification once belonged to one Vllig Lynch, according to historical records. The tower, measuring 11 metres long by 8.8 metres wide, rises to what was originally four storeys, though time has not been entirely kind to its upper reaches.

The castle’s defensive features tell the story of a turbulent past. Visitors entering through the robbed doorway on the eastern wall would have found themselves in a small lobby, nervously aware of the murder hole overhead; a sobering reminder that not all guests were welcome. From this cramped space, one could access either the ground floor chamber or ascend the spiral staircase tucked into the northeast corner, though these stairs now end abruptly above the first floor. The interior reveals glimpses of medieval life: a stone vault separates the first and second floors, whilst a fireplace in the south wall would have provided warmth, and a garderobe chute in the north wall speaks to more practical concerns. The third floor remains tantalisingly out of reach, its secrets hidden save for an intramural passage visible at the southeast corner.

Surrounding the tower, keen observers can still trace the outline of what was once a square bawn, roughly 18 metres on each side, defined today by low earthen and stone banks to the east, south and southwest. Early Ordnance Survey maps from the 19th century show this defensive enclosure once boasted circular turrets at its southeast and southwest corners, though these have long since vanished. The castle’s windows, a mix of narrow defensive slits and single lights with both flat and ogee shaped heads, peer out across the Galway countryside, their varied styles hinting at different periods of construction or renovation throughout its long history.