Poulnabrone dolmen is an example of a portal dolmen or portal tomb, not to be confused with passage tombs such as Newgrange! Dolmens are found in Ireland and throughout the world and are generally characterized as a single-chamber megalithic tomb, often consisting of three or more upright stones (megaliths) supporting a large flat horizontal capstone (table). (1)
What is a dolmen?
Dolmens are thought to have been ancient tombs or burial markers and also served as places for ritual and worship although their exact purpose and significance is still debated by scholars and researchers. There are dolmen sites throughout Europe and Asia, including the dolmen Er Roc’h Feutet (Roch-Feutet) in Carnac, France, the Monte Bubbonia in Sicily, several in Gochang, South Korea and in Kerala, India.