The reef itself is an elevated natural platform, and its height gives it sweeping views across the surrounding landscape, particularly to the south and west. It is the kind of place that rewards slow attention: what looks at first like overgrown rough ground resolves, on closer inspection, into the shapes of ancient earthworks, stone mounds, and a short linear bank that cuts across the surface of the reef.

The enclosures here are the circular or subcircular banks of earth and stone that appear throughout early Irish settlement archaeology, used variously as farmstead boundaries, enclosures for livestock, or the foundations of more elaborate habitation sites. At Caherweesheen, one of the more clearly defined examples measures 12 metres in diameter, with an enclosing bank roughly 1.6 metres wide and standing about 0.35 metres above the surrounding ground on its outer face. The interior, some 9.5 metres across, sits approximately one metre below the top of that bank, giving the enclosed space a slightly sunken quality. A gap on the southern side, around two metres wide, may mark an original entrance. Immediately to the north of this enclosure lies at least one near-identical counterpart, and the reef also carries two stone mounds of noticeably different sizes, the purpose of which is less easily read. The site was recorded during a survey of the Lee Valley area carried out by Michael Connolly in 1996 to 1997.