Presaddfed Burial Chamber is a listed monument in Anglesey, north Wales, comprising two Neolithic chamber tombs. It is a scheduled ancient monument and is located a short distance northwest of Bodedern. It is maintained by Cadw.
There are two neolithic tombs at this site, which is located about 100 m (330 ft) south of Llyn Llywenan and about 1 km (0.6 mi) northwest of the village of Bodedern. The southern tomb is the more complete; it has a capstone some 4 by 3 m (13 by 10 ft), supported by three stout upright stones at the south end and by a single more slender stone at the north. Additionally there is a wooden frame beside the north upright that may provide some additional support. The northern tomb is considerably damaged with two remaining uprights at the north end; the capstone has fallen and is leaning against them. During the eighteenth century, when this site was first recorded, this chamber was already in a state of disrepair. It is unclear whether these chambers, which are only a few metres apart, were part of the same structure or were independent. A report in Archaeological Journal in the mid-nineteenth century states that at that time the chambers were surrounded by a large number of small stones. Nowadays, this stone debris is no longer visible, but its former presence may indicate that at one time, both chambers were buried under a single mound, as is the case in the multi-phase burial tomb at Trefignath, some 9 km (6 mi) west of here.
About half a mile east of the burial chamber, on the ridge between Tre-Iorwerdd and Presaddfed, there is a tumulus with a circumference of about 55 m (60 yd). It was excavated in 1870 and a jet bead and cremation urns were unearthed. Presaddfed Burial Chamber is a scheduled ancient monument. The Royal Commission on the Ancient and Historical Monuments of Wales curates the archaeological, architectural and historic records for the site. These include digital photographs, colour and black and white photographs, drawings, NMR site files, and Cadw guardianship records.