Republic of Ireland, County Donegal, Horn Head near Dunfanaghy with a mini cairn in the foreground and the Atlantic Ocean in the background.

Republic of Ireland, County Donegal, Gweedore, mini cairn on the foothills of Errigal which is Donegal's highest mountain.

Republic of Ireland, County Donegal, Gweedore, mini cairn on the foothills of Errigal which is Donegal's highest mountain.

Ireland, County Sligo, Castlebaldwin, Carrowkeel Megalithic Cemetery, Facade of one of the cairns known as Cairn H with entrance doorway visible..

Ireland, County Sligo, Castlebaldwin, Carrowkeel Megalithic Cemetery.

Ireland, County Sligo, Castlebaldwin, Carrowkeel Megalithic Cemetery, View from the summit over one of the cairns..

Ireland, County Sligo, Castlebaldwin, Carrowkeel Megalithic Cemetery, View from the summit over two of the cairns..

Ireland, County Sligo, Deerpark Court Tomb.

Ireland, County Sligo, Creevykeel Court Tomb looking north.

Ireland, County Sligo, Creevykeel Court Tomb looking south.

Ireland, County Sligo, Ben Bulben mountain seen from the summit of Maeve's Cairn on Knocknarea mountain with sea fog rolling in.

England, Cumbria, Great Shunner Fell, Nine Standards Rigg, 662m, cairns at the summit of Hartley Fell.