No earthwork survives above the surface; what gives the site away is a cropmark, the faint difference in colour and growth that ripening grain or grass can betray when a buried ditch below affects how deeply roots can reach. In dry summers especially, the soil above a filled fosse, that is, a prehistoric ditch or trench, drains faster than the surrounding earth, leaving a ring of stressed, slightly paler crop that a camera from altitude can catch even when a person standing at the field edge would notice nothing at all.

The enclosure at Kilcreen was recorded precisely this way, spotted on an aerial photograph taken on 16 July 1971 as part of the Cambridge University Collection of Aerial Photography, reference CUCAP BGG033. The ring is small, roughly ten metres in diameter, and is classed as a ring-ditch, a category of monument generally understood to represent the buried remains of a circular ditched enclosure, in some cases the vestige of a burial mound whose central mound has long since been ploughed away. What makes the Kilcreen example more than a solitary curiosity is its immediate landscape context. A second ring-ditch was identified approximately ninety metres to the north-north-west, and a possible further enclosure sits around sixty-five metres to the north-west. Between them, overlaying all of it, lies a relic field system, a pattern of former boundaries no longer in active use. The chronological relationship between these features is legible even from the air: one of the old field boundaries runs roughly north-west to south-east directly across the ring-ditch, which means the field system is the later imposition, laid out over ground that had already been marked, used, and largely forgotten.

Taken together, the cluster points to a small but layered prehistoric or early historic landscape, one generation of land use cutting across another, preserved now only as faint signatures in the soil and visible, if at all, only from above on the right dry summer's day.