It exists, in a sense, only from the air. A single aerial photograph, taken as part of the Cambridge University Collection of Aerial Photography, revealed a series of roughly rectilinear fields arranged across the ground in a pattern that ground-level surveying had simply never captured.

The field system predates or otherwise escaped the notice of nineteenth-century mapmakers, which raises the kind of quiet questions that aerial archaeology tends to generate. Rectilinear field systems of this sort are often associated with early agricultural organisation, potentially of prehistoric or early medieval origin, though without excavation the dating remains open. What is known is that by the time the racecourse was laid out and landscaped at Ballykisteen, the physical traces of those boundaries were absorbed into the new ground works. The banks, ditches, or whatever earthworks once marked the field divisions were smoothed away, leaving no surface expression whatsoever.

The site sits at the centre of the racecourse, which means the ground above it is actively managed and maintained as part of a working venue. There is nothing to see from the trackside or the infield. The field system survives, if that word applies, only as a pattern of tonal variation captured in one aerial image, a record of something erased.