A West Cork Ireland Altar Rock Megalithic Wedge Tomb

A West Cork Ireland Altar Rock Megalithic Wedge Tomb located between Schull and Goleen, County Cork.
From Wikipedia: Wedge tombs of this kind were built in Ireland in the late Neolithic and early Bronze Age, c. 2500–2000 BC.
Cremated burials took place in 2000 BC and pit burials c. 1200 BC. Around AD 200 a pit was dug and filled in with fish, shellfish and cetacean bones, presumably as a ritual practice.
Despite the name, there is no evidence that the "altar" was ever used for sacrifice. It was used as a Mass rock in the 18th century AD. A holy well stood across the road.
It was excavated in summer 1989 by Dr. William O'Brien and Madeline Duggan. Material found included cremated human adult bones, a tooth, worked flint, charcoal, periwinkles, fish bones and limpets. The entrance was aligned ENE–WSW, possibly with Mizen Peak (Carn Uí Néit) and maybe to catch the setting sun at Samhain (November 1).