Knowth, neolithic passage grave, UNESCO World Heritage Site, prehistoric Bru na Boinne, Valley of the River Boyne, County Meath, Leinster, Republic of Ireland, Europe

photography colour colour image color color image horizontal horizontal image day nobody no one no one travel travel destination travel destinations tourist destination ancient rock prehistoric prehistory ancient culture knowth neolithic burial site headstone head stone grave grave stone gravestone unesco unesco world heritage site world heritage site bru na boinne valley of the river boyne county meath leinster ireland republic of ireland irish europe european archaeological site blue sky megalithic art carving carved detail