Where peat has been cut away over generations, a set of ancient field boundaries has reappeared at the surface, walls that were already old when the bog swallowed them and that nobody designed for rediscovery.

Two distinct areas of these pre-bog walls survive. The first curves in a broken arc from the north-east, round through east, and down to the south, partially enclosing the hill's summit, with a cross-wall running directly over the top. The whole arrangement covers roughly 150 metres by 75 metres. The second, spread across the north-eastern slopes, is considerably larger, perhaps 300 metres by 400 metres, and comprises at least ten separate stretches of walling. These are stony banks rather than the upright slabs of the summit section, and they appear to lay out a series of rectangular fields, the kind of organised land division that suggests sustained agricultural activity rather than casual enclosure. One of these lower walls ends at a large orthostat, an upright stone set into the ground, whose dimensions closely match those of a standing stone recorded nearby on the same hill. Whether the two are related in purpose or period is not certain, but the proximity is suggestive. On the north-western slope there is also what may be a stone pair, two standing stones set in deliberate relationship to each other, a monument type found elsewhere in the west of Ireland and associated broadly with prehistoric ritual use of the landscape.

Cutaway bog, where hand or machine cutting has removed the upper layers of peat, regularly exposes features that blanket bog had concealed for millennia. At Ballynew, that process has revealed a landscape that was once actively farmed and organised, complete with enclosures, field boundaries, and possibly ceremonial stonework, all preserved beneath the peat until the cutting began. The co-occurrence of what look like agricultural walls and what may be ritual monuments on the same hill is the kind of detail that tends to get overlooked in the broader record, but it speaks to how densely and variously prehistoric communities used even apparently marginal ground.