The biggest and most famous of the Burren's megalithic tombs, Poulnabrone ("the hole of sorrows") is a portal grave/dolmen with a massive capstone and a majestic presence amid the craggy limestone fields shouldering the moody grey Burren skies. The monument was built around 4,500 years ago. Stand down the wind and you might hear ancient whispers. There is a designated car park nearby with an historical timeline, and a short gravel walkway to the dolmen (freely accessible).
It's open and windy here, so grab an extra layer.
(on R480, 8 km [5 miles] south of Ballyvaughan), Carron, Co. Clare, Ireland