This one is remarkable for what it no longer is. A standing stone in Annagannihy, County Cork, has vanished so completely that it leaves no visible surface trace, and the ground where it once stood gives nothing away. It exists now only as a cartographic ghost, a single notation on a map made over a century ago.

Standing stones are among the most enigmatic of Irish prehistoric monuments, typically large upright slabs of rock set into the earth by hand, their original purposes debated by archaeologists ever since. They appear on hundreds of sites across Ireland, sometimes alone, sometimes in alignment with other stones or monuments, and they date in most cases to the Bronze Age. The Annagannihy stone had already slipped through the documentary record before anyone thought to record its dimensions or appearance. It does not appear on the Ordnance Survey six-inch map of 1842, nor on the 1940 revision, but it does appear on the 1904 edition, marked plainly as a single standing stone. That narrow window of visibility, present on one survey and absent from two others spanning nearly a century on either side, suggests the stone may have been removed sometime after 1904, most likely cleared from agricultural land. Whatever the reason for its disappearance, no trace remains to suggest it was ever there.