Celebrated as part of European Rock Art Day celebrates was the 5000-year old burial site of Barclodiad y Garwes in Anglesey, North Wales. This unique burial chambered site was excavated in the early 1950s by Glyn Daniel and Terrence Powell. Revealed at this time were five engraved upright stones that form part of the chamber and passage architecture. The engravings, made-up of chevrons, concentric circles, spirals and zigzag lines are pecked and possibly represent a form of prehistoric communication system. The same motifs are found in Ireland and along, what is termed the Atlantic façade (France, Portugal, Spain and southern Scandinavia). Barclodiad y Gawres was the only site in the UK to be recognised by the PRAT-CARP (Cultural Route of the Council of Europe) for this special day. Two lectures were given during the day by rock art specialist Professor George Nash who talked about the when, where and why of the monument and its artistic secrets. Thanks to Cadw, visitors to the site were allowed rare access to the main gallery where the rock art is located. Up to 60 visitors braved the bracing weather and were treated to an archaeological and historical tour of one of Wales' premier prehistoric sites.