Most of these early medieval enclosures, built roughly between the fifth and twelfth centuries as enclosed farmsteads for a single family or small community, survive as circular earthworks defined by a bank and outer ditch. At Coolquill in County Tipperary, the enclosure is still there in outline, but someone at some point drove a quarry straight into its western quadrant, twenty-five metres long and nearly a metre deep, then dumped the upcast material back inside the very space it came from.

The site sits on poorly drained, undulating upland ground with open views in every direction, the kind of position that would have made practical sense to an early medieval farmer keeping watch over cattle and crops. It is classified as a univallate platform-type ringfort, meaning it has a single enclosing bank and sits slightly raised above the surrounding ground level. The interior measures roughly 32 metres north to south and 22 metres east to west, enclosed by an earthen bank that survives best on the western side, where it still reads as a genuine earth and stone feature. Elsewhere it has been worn down to little more than a low scarp, the outer fosse or ditch remaining legible only on the eastern arc, filled in everywhere else. Fifteen metres of the bank on the southern side have been levelled entirely, apparently to allow access to the quarry. Cattle have further damaged the eastern and western faces. A spoil heap from land reclamation sits just five metres to the north-east of the bank. About 250 metres to the north-west stands a separate motte and bailey, a type of Norman fortification consisting of a raised earthen mound beside an enclosed courtyard, suggesting this corner of Tipperary saw successive waves of settlement and control across several centuries.

What makes the Coolquill ringfort worth pausing over is precisely its condition. The quarrying, the filled-in ditch, the levelled bank, the cattle damage, the land reclamation heap, all of it records the incremental pressures that have erased similar sites elsewhere without leaving any trace at all. The fact that the outline survives, however reduced, is not a given.