Ballykeel Dolmen is an ancient megalithic structure located in Northern Ireland.

The Gaulstown Dolmen is a megalithic monument located in County Meath, Ireland.

Ballynageeragh Portal Tomb is a megalithic tomb located in County Waterford, Ireland. It is one of the finest examples of this type of tomb in Ireland.

The Poulnabrone Dolmen is a massive dolmen located in The Burren in County Clare, Ireland.

The Dolmen of Oppagne is a portal grave (allée couverte) attributed to the Seine-Oise-Marne culture and is located in the south of Belgium.