The enclosure at Coolnagoppoge is not dramatic to look at, and that is rather the point. Its walls survive to between 0.3 and 1 metre in height, running roughly 17.7 metres from northwest to southeast and 13 metres from northeast to southwest. What makes it quietly odd is something you can only appreciate by looking at the ground inside: the eastern portion of the interior sits up to a full metre higher than the western section and higher, too, than the ground immediately outside the eastern wall. That asymmetry suggests someone deliberately raised part of the enclosed area, building up the earth or rubble within it for a reason that is no longer immediately obvious.

The enclosure came to light during pre-development survey work carried out by John Cronin and Associates ahead of a wind farm project in the townland of Coolnagoppoge. Its discovery was formally recorded under archaeological licence in 2016. The feature is almost certainly connected to a nineteenth-century farmstead that once stood about 200 metres to the south. Enclosures of this kind, defined by dry-stone walls and associated with post-medieval rural farmsteads, were often used as garden plots, animal pounds, or small cultivated yards, and the artificially raised eastern platform might reflect any of these functions, or something more particular to the needs of whoever worked this land. The site shares its basic form with a number of comparable enclosures documented across the same survey area, suggesting that this type of modest, functional structure was a fairly consistent feature of the upland farming landscape in this part of Kerry.

The site lies within rough, wet ground, and the vegetation that helped preserve it also makes it genuinely difficult to read at ground level. The walls are largely overgrown, and without knowing where to look, most visitors would simply walk past what appears to be a slight rise in a boggy field.