It cannot be walked, measured, or even glimpsed on the ground. The area has been planted with conifers, and the landscape gives nothing away. What we know of this arrangement of ancient fields comes entirely from a single aerial image, and even that knowledge comes with a caveat.

The field system at Kildanoge was identified from an Air Corps aerial photograph, reference V.309/2240-1, taken over marshy terrain where small streams run downhill from the mountains and spread into boggy ground. The image shows at least three fields, with the most northerly one subdivided by a boundary running north to south. Cropmarks, the faint differential patterns in vegetation or soil that betray buried features to a camera above, are how archaeologists often locate sites that have left no upstanding remains. Here, though, there is an acknowledged uncertainty: the marks in the photograph may not represent field boundaries at all, but rather the lines of an old drainage system laid out to manage the wet ground. The two possibilities are not entirely separate. Early farmers working marshy terrain often dug drainage channels and threw up low banks simultaneously, and the distinction between a drained field and a drained marsh can be difficult to call from the air.

There is nothing to see at Kildanoge today. The conifers have seen to that. The interest of the place lies precisely in its invisibility, in the fact that something, fields or drains or both, was organised here at some unknown point in the past, and that the only record of it is a frame of aerial film held somewhere in an archive.