On satellite imagery, a ring roughly thirty metres across appears as a cropmark, the kind of faint, ghostly outline that only becomes legible from altitude and under the right conditions of soil moisture and plant stress.

Cropmarks form when buried features, such as the fosse, or ditch, of an enclosure, affect the vegetation above them. A filled-in ditch retains more moisture than the surrounding soil, producing a strip of lusher, darker growth; in dry summers this contrast sharpens into something a camera can catch. The Annamult enclosure was identified through exactly this process, spotted and reported by Jean-Charles Caillère from satellite imagery. The fosse traces a rough circle, suggesting the kind of enclosed farmstead or defended settlement that appears widely across the Irish landscape, though without excavation the enclosure's date and precise function remain unknown.

Because the site exists below the current ground surface and is only detectable as a cropmark, there is nothing visible to a visitor standing in the field itself. Its existence is, for now, an aerial fact.