What draws attention is not its scale but its form: an irregular shape defined by a crudely constructed stone wall, roughly half a metre thick and just over a metre high, that shifts between straight and curved depending on which side you approach. The western and northern faces are relatively linear, running 7.4 metres and 5.3 metres respectively, while the remaining sides follow a looser, curvilinear path. A narrow entrance, only half a metre wide, breaks the northern wall.