The ring barrow at Emlagh is barely four and a half metres across at its widest point, and its enclosing earthworks rise only a few centimetres above the surrounding ground. That near-invisibility is itself part of what makes it worth attention: this is prehistoric funerary architecture worn down to almost nothing, surviving in a working field.

A ring barrow is a burial mound, typically of Bronze Age date, defined by a circular ditch and an accompanying bank rather than a large heap of earth. At Emlagh, the ditch, known as a fosse, is roughly two metres wide but only five to ten centimetres deep at most, and the outer bank that once bounded it stands no higher than ten centimetres on its interior face. What survives is traceable only along the western to north-western arc and from the north-east to south-east, meaning a good portion of the circuit has been lost. Two processes have contributed to that loss. On the northern side, a pocket of erosion has eaten into the earthwork, most likely the result of livestock trampling the ground over many generations. Across the south-western sector, a land drain running roughly west-north-west to east-south-east has cut through both the fosse and the outer bank, severing them cleanly. These are the ordinary pressures of agricultural life, playing out slowly across a monument that was already ancient when the field was first ploughed.