Enclosure, Carricknahorna, Co. Donegal

The structure at Carricknahorna measures roughly 20 metres across and is defined by a low stone bank, now covered in soft moss and sod, that rises just 30 centimetres above the surrounding pasture. This weathered boundary wall varies in width from two to two and a half metres, creating an almost perfect circle in the landscape.

The enclosure's construction cleverly works with the natural topography of the site. Along the northern, upslope section, the stone bank sits nearly flush with the exterior ground level whilst creating a broad internal slump that follows the hill's natural gradient. The interior space slopes gently from north to south, and archaeologists have identified what appears to be the original entrance; a three-metre gap in the southeastern section of the bank where the stones give way to open ground. Intriguingly, remnants of what may have been an associated field boundary can still be traced as a faint, grass-covered rise extending east-northeast from the enclosure's eastern edge.

Today, the site exists as a subtle feature in the landscape, with modern field walls and property boundaries overlaying portions of the ancient stone bank along its southeastern to southwestern sections. Like many such monuments scattered across Ireland's countryside, this enclosure likely served agricultural or ceremonial purposes for the communities who once inhabited these limestone hills, though its exact function and age remain subjects for further archaeological investigation.