Poulnabrone Dolmen (Poll na mBron) (Hole of Sorrows), a Neolithic portal tomb probably dating from between 4200 to 2900 BC, Burren, County Clare, Munster, Republic of Ireland, Europe

Moody sky over Poulnabrone Dolmen Portal Megalithic tomb at dusk, The Burren, County Clare, Munster, Republic of Ireland (Eire), Europe

Poulnabrone Dolmen Portal Megalithic Tomb, The Burren, County Clare, Munster, Republic of Ireland, Europe

Poulnabrone Dolmen Portal Megalithic Tomb, The Burren, County Clare, Munster, Republic of Ireland (Eire), Europe

Poulnabrone Dolmen Portal Megalithic Tomb, The Burren, County Clare, Munster, Republic of Ireland, Europe

Poulnabrone Dolmen Portal Megalithic Tomb, The Burren, County Clare, Munster, Republic of Ireland, Europe

Poulnabrone Portal Dolmen megalythic burial tomb, 3800BC, in The Burren glaciated landscape, County Clare, Ireland

Poulnabrone Dolmen, The Burren, County Clare, Ireland

Poulnabrone Dolmen, The Burren, County Clare, Ireland

The poulnabrone dolmen at sunset, near ballyvaghan, County clare, ireland

Poulnabrone Dolmen, The Burren, County Clare, Ireland

Poulnabrone Dolmen, The Burren, County Clare, Ireland

Ancient Poulnabrone Dolmen; County Clare, Ireland

Ancient Poulnabrone Dolmen; County Clare, Ireland

Ancient Megalithic Tomb, Poulnabrone Dolmen; Ballyvaghen, County Clare, Ireland

Ireland, County Clare, The Burren, Poulnabrone Dolmen - The thin capstone sits on two 18 metre (6 feet) high portal stones.