Roughly twenty-four metres across in both directions, it is subrectangular in shape, defined by a scarp, essentially a slight artificial slope or drop at the platform's edge, with faint traces of drystone revetment surviving at the south-west corner. Drystone revetment is a facing of dry-laid stones used to stabilise and retain an earthen bank or edge, and its presence here, even in such fragmentary form, is a sign of deliberate construction rather than natural ground movement.

The place name offers a useful clue. Lisglennatober combines elements that suggest an enclosure, a glen, and possibly a well, a combination that points towards early medieval or later settlement activity in this part of Largan. The platform itself is poorly preserved, meaning that much of whatever structure or use it once supported has been obscured by centuries of farming, weathering, and the slow settling of the land. What remains is the basic geometry: a slightly raised, inward-sloping interior that drops from south-west to north-east, and that defining scarp which gives the whole thing its readable outline. Sites like this are easy to walk past without a second glance, which is part of what makes them quietly compelling.