No earthwork survives above ground, no stones mark the perimeter, and a person walking the land would find nothing obviously out of place. The enclosure announces itself instead through the crop itself, as a cropmark, the phenomenon where buried foundations or ditches affect how plants grow above them, producing visible rings or outlines when viewed from the air at the right moment in the growing season.

The circle at Ballinteskin was photographed by Michael Moore on the 16th of July 2006, captured while the field was under tillage. That midsummer date is no coincidence; late June and July are typically when cropmarks appear most sharply, as ripening grain stresses differently over buried features than over undisturbed soil. What exactly lies beneath the surface remains unexcavated and unconfirmed, but circular enclosures of this kind in the Irish landscape can represent anything from prehistoric settlement boundaries to early medieval ringforts, the latter being the farmstead form that once dominated the Irish countryside in their thousands.