It is easy to mistake for a natural rise in the ground, and that quality of near-invisibility is itself part of what makes it interesting.

This earthwork is a rath, the most common type of ringfort found across Ireland, typically dating from the early medieval period between roughly the fifth and twelfth centuries. A rath consists of a roughly circular area enclosed by one or more earthen banks, and was most likely used as a farmstead or family enclosure rather than a military fortification. The Cottstown example is modest by any measure: roughly 29.8 metres north to south and 26.6 metres east to west, enclosed by a single earthen bank that rises to about 0.7 metres at its highest. A gap in the bank to the east-south-east probably marks the original entrance. The interior is largely level, though low, irregular undulations have been noted; they suggest subsurface activity of some kind, though nothing definitive has been mapped from them. Tens of thousands of ringforts survive across Ireland in varying states of preservation, and this one makes no particular claim on the attention. What it offers instead is an unadorned example of the form, sitting in working farmland, doing very little to announce itself.