Rows of 19th- and 20th-century headstones stand inside a roughly circular enclosure, reached by a stile set into a mortared stone wall. The wall, however, is not quite what it seems. It is a facing added to something far older, a rim of dressed stonework applied to the vertical exterior of an ancient earthen bank that predates it by perhaps a thousand years or more.

A rath, or ringfort, is an enclosed farmstead of the early medieval period, typically circular and defined by one or more earthen banks with an outer ditch. The one at Drumrevagh, known by the 1930 Ordnance Survey edition as Rathmorrow, appears on the earlier 1838 OS six-inch map as an unnamed, circular embanked enclosure with no particular distinction. By the mid to late 19th century, whoever managed the demesne had a more practical use in mind. The interior and enclosing bank were remodelled to serve as a burial ground. The bank's exterior face was cut vertical and sheathed in a mortared stone wall standing 1.3 to 1.4 metres high, encircling the entire circuit. The original eastern entrance, perhaps 2.5 to 3 metres wide, was blocked at its outer edge by the new wall, though the stile was added to preserve access. Inside, the enclosed space measures roughly 20 metres north to south and 24 metres east to west, with two yew trees, a scattering of hawthorn and sycamore, and the quiet geometry of a graveyard laid over a much earlier kind of enclosure. Fifteen metres to the north, a court tomb, a megalithic monument of the Neolithic period, predates even the rath itself, suggesting this rise in the pastureland has attracted human attention across an unusually long span of time.