At Aghaway in County Cavan, there is a ringfort that you cannot see. Where aerial surveys and official reports once recorded a substantial circular earthwork, the ground today gives nothing away.

A rath is a ringfort of earthen construction, the kind of enclosed farmstead that was built across Ireland throughout the early medieval period, roughly between the fifth and twelfth centuries. Thousands survive as low humps and hollows in fields across the country, easy to miss but still legible in the landscape. The Aghaway example was once a notable specimen. A report compiled by the Office of Public Works in 1970 recorded a raised circular area measuring approximately 44.5 metres on its northeast to southwest axis and 44 metres northwest to southeast, enclosed by an earthen bank and a fosse, which is the external ditch that typically accompanied such structures. The original entrance was thought to have faced north. By the time that description was set down, however, the site had already been levelled, and it is no longer visible at ground level.

What remains is the record of a place rather than the place itself, a reminder that agricultural improvement, drainage works, and land clearance have quietly erased a substantial portion of Ireland's early medieval archaeology. The dimensions noted in 1970 suggest a settlement of considerable size, large enough to have housed a family of some local standing, yet it was gone before most people thought to look for it.