Historical records show the castle was already standing in 1574 when it belonged to one Muriertagh O’Connor, placing it firmly within the tumultuous period of Gaelic and Anglo-Norman power struggles in County Galway.

Today, only fragments of this once imposing structure remain; the western wall still stands along with portions of the north and south walls, giving visitors a sense of the original rectangular tower house that stretched nearly 11 metres in length. The building once rose four or five storeys high, with each floor likely containing a small bedchamber and larger living room, a typical arrangement for tower houses of this period. The builders incorporated practical features like an intramural latrine passage on the first floor, though the staircase that once connected the levels has long since vanished. The main entrance was probably located in the north wall, though centuries of weathering have obscured many architectural details.

Local tradition speaks of a second castle on the site, which supposedly stood until a storm brought it down in 1839. No trace of this companion structure survives today, leaving only the romantic name “Two Sisters” and the solitary ruins on the hummock as testament to what once stood here. The site offers a glimpse into the defensive domestic architecture of 16th-century Connacht, when local chieftains built these compact but formidable tower houses to protect their families and assert their territorial claims.