The fort at Cabragh offers none of that. No fosse breaks the ground around it, and no entrance has been identified. What survives is a roughly subrectangular grass-covered area, measuring about 18.5 metres north-northeast to south-southwest and 17 metres east to west, sitting in a slight col along the spine of a drumlin ridge that runs northwest to southeast. A drumlin is a smooth, elongated hill formed from glacial debris, and County Monaghan is thick with them, giving the landscape its characteristic rumpled quality. Here, on that ridge, the enclosure is defined not by earthworks alone but by a combination of stone banks on the east and south sides and natural rock outcrops that form scarps on the west and north, rising to around a metre on the west and approximately two metres on the north.

The distinction matters because it suggests whoever chose this spot was working with the landscape rather than simply imposing a structure upon it. The stone bank on the east side has a base width of 2.5 metres narrowing to under a metre at the top, with an internal height of roughly 45 centimetres and an external height of about 70 centimetres, modest dimensions that speak more to enclosure and boundary-marking than to serious defensive ambition. Whether the site functioned as a farmstead enclosure, a gathering place, or something less easily categorised is not clear from what remains on the surface. The absence of a visible fosse, the ditch that typically runs around the outside of such earthworks, is genuinely unusual and adds to the uncertainty about how the space was originally entered or used.