It survives only in light, specifically in the differential way that crops grow over buried features, revealing their outlines to cameras carried aloft. That kind of evidence, known as a crop mark, appears when buried ditches or banks affect soil moisture and nutrients in ways that make the plants above them grow either taller or shorter than their neighbours. From the air, and under the right conditions, the pattern becomes legible. From the ground, there is nothing to see at all.

The enclosure at Colecot was identified through aerial photography and recorded in the Sites and Monuments Record, with the discovery attributed to T. Condit. Crop marks of square or rectilinear enclosures in Ireland are often associated with early medieval activity, though without excavation it is rarely possible to say much more than that. The flat, arable character of the land at Colecot is itself part of the reason the site was preserved in this oblique way; fields that have been continuously ploughed tend to erase upstanding remains entirely, leaving only the subsurface traces that aerial survey can sometimes catch. The record was compiled by David O'Connor and updated by Christine Baker, with the entry uploaded in December 2014.

There is, frankly, very little to see if you visit. The site sits within agricultural land, and the enclosure leaves no impression on the modern landscape whatsoever. What makes it worth knowing about is precisely that absence, and what it implies about the density of activity that once existed across seemingly ordinary Irish farmland, now legible only to specialist surveys and the occasional sharp-eyed pilot on a dry summer's day when crop stress is at its peak. If the archaeology of invisible things interests you, the National Monuments Service's database entry is where the documentation lives, and aerial photographs held in the SMR file represent the closest thing to a primary source that currently exists for this site.