819-868 - Knowth, a Neolithic passage grave, ancient monument, UNESCO World Heritage Site of the Bru na Boinne, Drogheda, County Louth, Leinster, Republic of Ireland, Europe
819-842 - Giant's Causeway, UNESCO World Heritage Site, Bushmills, County Antrim, on the north coast of Northern Ireland, Ulster, Northern Ireland, United Kingdom, Europe
819-844 - Giant's Causeway, UNESCO World Heritage Site, Bushmills, County Antrim, on the north coast of Northern Ireland, Ulster, Northern Ireland, United Kingdom, Europe
819-845 - Mussenden Temple, a small circular building located on cliffs near Castlerock in County Londonderry, Ulster, Northern Ireland, United Kingdom, Europe
819-857 - Giant's Causeway, UNESCO World Heritage Site, Bushmills, County Antrim, on the north coast of Northern Ireland. Ulster, Northern Ireland, United Kingdom, Europe
819-858 - Mussenden Temple, a small circular building located on cliffs near Castlerock in County Londonderry, Ulster, Northern Ireland, United Kingdom, Europe
819-841 - Giant's Causeway, UNESCO World Heritage Site, Bushmills, County Antrim, on the north coast of Northern Ireland, Ulster, Northern Ireland, United Kingdom, Europe