Known by various names throughout the 19th century; ‘Stones’ on the 1834 Ordnance Survey map, ‘Pagan Burial Place’ by 1846, and rather dramatically as ‘Druid’s Altar in Ruins’ on pre-publication surveys; this enigmatic monument sat 600 metres south of another megalithic site in the area. Its true nature and original purpose remain frustratingly uncertain to this day, though the discovery of burnt bones and ashes during its demolition hints at its possible use as an ancient burial site.

When antiquarian Thomas Fagan visited the site in 1846, he found what he described as ‘the ruins of a pagan altar and sepulture commonly called the Grey Rocks’, though much of it had already been demolished just a few years earlier. His detailed observations provide our only glimpse of what must have been an impressive structure: three massive stone flags, each measuring an extraordinary 10 to 11 feet across (roughly 3 to 3.3 metres), with at least two of them originally resting atop upright stones that stood about 6 feet high (1.8 metres). The sheer scale of these stones suggests considerable effort went into the monument’s construction, whoever its builders were.

Sadly, by the early 20th century, every trace of this intriguing feature had vanished from the landscape. The Ordnance Survey Name Book of 1904 confirmed its complete removal, leaving only historical records and speculation about what exactly stood in that Donegal field. Whether it was truly a druid’s altar, a prehistoric burial chamber, or something else entirely, the Grey Rocks of Gortree have become another casualty of Ireland’s complex relationship with its ancient past, demolished before proper archaeological investigation could unlock their secrets.