Barclodiad y Gawres is a Neolithic burial chamber. It is an example of a cross-shaped passage grave, with a main and two side chambers. Some of the stones have spirals, zig-zags, lozenges and chevrons

The megalithic complex was used for sacred purposes in the Neolithic and Bronze Ages. In Celtic times it may have been connected to one of the "Druid groves" of Môn Mam Cymru mentioned by Tacitus. This cannot be ruled out because megalithic sanctuaries often had significance in the pagan Celtic religion.

One of the decorated stones is seen on the right