St Lythans Chambered Tomb

St Lythans Chambered Tomb stands in a grassy field called Maesyfelin, about one kilometre west of the small hamlet of St Lythans in the Vale of Glamorgan. The site is reached through a kissing gate and sits on gently sloping pasture often shared with a herd of cows. A low earthen mound, now much reduced, once covered the chamber but has eroded over centuries. The dolmen itself consists of three upright mudstone slabs supporting a large capstone that slopes down from the entrance. The entrance faces east and the chamber is aligned east to west, standing nearly two metres tall inside. Built around 4000 BC, the tomb belongs to the Severn-Cotswold group of chambered long barrows. It was constructed by Neolithic farmers who had settled in the area after clearing the surrounding woodland. Archaeologist Francis Pryor suggests such sites served as communal gathering places for social events and exchanges. Nearby Tinkinswood, another chambered tomb, was built at the same time and may once have resembled St Lythans more closely. More than 150 similar cromlechs survive across Wales, including Pentre Ifan and Bryn Celli Ddu. Visitors find a quiet field with the dolmen standing exposed under open sky. The capstone measures four metres long and three metres wide, resting on two smoothed uprights with a small port-hole in the rear stone. From the kissing gate, about fifty metres away, the chamber is clearly visible without needing to enter the field. The site is maintained by Cadw and has never been fully excavated, leaving its original forecourt and mound largely vanished. The name Gwâl y Filiast recalls an old tale of the capstone turning on Midsummer’s Eve, while the field’s nickname, the ‘Accursed Field’, hints at local folklore of infertility.