This weathered monolith is all that remains of what the Ordnance Survey recorded in 1845 as ‘four remarkable stones, two of them placed so as to form a grave’. The three missing stones, which stood roughly 75 metres south of the survivor, were arranged in what locals called the ‘Giant’s Grave’; though by the time antiquarian Thomas Fagan visited in the summer of 1846, they had already been removed, victims of agricultural improvement or stone robbing.

The nature of this supposed Giant’s Grave remains a mystery, as the stones were destroyed before any proper archaeological investigation could take place. The name itself, common in Irish folklore for prehistoric monuments, tells us little about the site’s original purpose; it could have been anything from a Bronze Age burial chamber to a stone alignment. What we do know is that the area was rich in prehistoric remains; workers levelling a nearby fort discovered a stone coffin containing bones, an urn and other grave goods, likely from a Bronze Age cist burial.

Today, this lone standing stone serves as a poignant reminder of Ireland’s vanishing archaeological heritage. Countless prehistoric monuments met similar fates during the 19th century, when agricultural expansion and a lack of preservation awareness led to widespread destruction of ancient sites. The stone at Liscooly, catalogued in the Survey of the Megalithic Tombs of Ireland as an unclassified monument, stands as both a survivor and a memorial to its lost companions, offering visitors a tangible link to the prehistoric landscape that once dominated this corner of Donegal.