This is a rath, a type of ringfort that was once the most common form of rural settlement in early medieval Ireland, typically serving as a farmstead enclosed by one or more earthen banks. The one at Liscubba is modest in scale, roughly 28 metres north to south and 32 metres east to west, but the bank still stands to about 1.7 metres in height, and the silted-up fosse, the external ditch from which the bank material was originally dug, remains legible in the landscape.

The monument carries the visible marks of centuries of agricultural life pressing up against it. A field fence runs along the levelled northern to eastern stretch of the bank, a practical imposition that has worn the earthwork down in places. To the north, field clearance stones have been dumped against the outer face of the bank, the slow accumulation of generations of farmers tidying their fields by pushing debris toward the nearest available boundary. There is a hole roughly two metres across and 1.5 metres deep dug into the bank on the south-south-west side, and a narrow break in the bank to the east, just 1.4 metres wide. Whether either of these openings is original or later interference is not clear, though casual digging into ancient earthworks was historically common, sometimes motivated by folklore around buried treasure or simply by the need for soil and material elsewhere on a farm.