The Altar Wedge Tomb is one of the best-preserved and most accessible megalithic monuments in West Cork, Ireland. This wedge-shaped tomb is located directly on the shore of Toormore Bay, along the famous Wild Atlantic Way.
The tomb dates from the late Neolithic or early Bronze Age, approximately between 3000 and 2000 BC.
Besides its original function as a tomb, the site was used in the 17th and 18th centuries (during the Penal Laws) as a Mass Rock (altar stone) where Catholic priests secretly celebrated mass.
Fish remains and shells were found in a pit near the entrance, suggesting that sacrifices were also made there in later periods (such as the Iron Age).