The Knockeen portal tomb is one of Waterford’s outstanding monuments and ranks among the finest portal tombs in Ireland. It stands in the middle of a hedgerow bordering 2 fields standing at an impressive 3.5 metres (13 feet). This huge dolmen is of a slightly different design than others in the area with it’s large main capstone set almost level against a secondary capstone that is almost of equal size. The chambers also remain covered and are in of excellent quality.  A feature of the tomb is a small ‘keyhole’ entrance that may have been used to offer food to the spirits of the dead or for access to those performing rituals. The field to the north was also once the cemetery of old Kilburne church. Some of theses gravestones date back to the mid 1700’s which may indicate a continuous use of this area for the dead for thousands of years. It is quite common that portal tombs faces uphill and in this case is facing north west. Unlike some other portal tombs in Waterford which had some remedial work carried out, this tomb stands in its original state.