In the townland of Dromkeen in north County Kerry, a ringfort once occupied a patch of ground to the south-east of another nearby enclosure. A ringfort, or rath, is a type of circular earthwork enclosure, typically dating from the early medieval period, that would originally have enclosed a farmstead and its inhabitants behind a raised bank and ditch. This one has left nothing behind. No earthwork, no ridge in the soil, no trace legible to the eye.

What makes the site worth noting is the gap between two maps. The Ordnance Survey recorded the enclosure during its 1841 to 1842 survey of the area, marking it clearly enough to be catalogued. By the time the 1916 edition of the same map was produced, it had been removed from the record entirely, and no surface evidence remained to explain why. Somewhere in the intervening decades, the feature was ploughed out, levelled, or otherwise erased from the landscape. C. Toal's North Kerry Archaeological Survey, published in 1995, noted it as entry number 550, preserving at least the fact of its former existence. That the survey bothered to record a site with no surviving remains is itself a small act of archaeological conscience, acknowledging that absence is also a kind of evidence.