Llanddaniel Fab , Anglesey, North Wales . Bryn Celli Ddu is one of the most famous ancient monuments in Wales. Situated in a field near the village of Llanddaniel Fab on the Isle of Anglesey, the entrance to the burial chamber is through a 20 foot long passageway. It is known that the site was broken into in 1699 by men with lanterns who were terrified by the site of the rounded pillar standing like a ghost in the main chamber. The site became more derelict over the years until in 1927-31 it was excavated and restored.
Evidence suggests the site is the product of two different religious systems.
The first phase is a henge, an open air sanctuary for religious ceremonies and included the ditch and bank and the ring of stones. Phase two is the burial chamber, a classic passage grave with a high chamber roof and lower passage roof. No bones or other artefacts were found during the excavations but there is a rough spiral inscription on the first stone on the left as you enter the chamber, and a stone with zig zag inscriptions standing alone on the outside of the chamber. However it is a pity they couldn't have erected the boundary fences further from the chamber. Take the A4080 for 2 miles and turn right at first crossroads.