(1) A chambered burial cairn known as Maeshowe is also being examined for potential damage as part of the study.

(2) The travellers and their guide came to the last ridge that rose between them and the summit, where they could see a tumbled cairn of stones.

(3) The royal visitor's final duty was to lay the final stone to a cairn built outside the main entrance and to unveil a commemorative plaque.

(4) Burial cairn

(5) This path is indicated by a small cairn of stones.

(6) Beyond the col, the track becomes steeper and you have to work a little harder to reach the summit of Mid Hill at 422m with its prehistoric burial cairn and view indicator.

(7) I noticed a cairn of rocks piled up at the start of a rough side path.

(8) Near the lake named for him in central Alberta, not far from the homestead where he raised his nine children, a stone cairn will honour his extraordinary life.

(9) There are several hillocks, but the actual summit has a good cairn to reassure you that you have indeed reached the top!

(10) Nearby is the 350m Auchenlaich cairn - the longest megalithic burial cairn in Britain.

(11) Unusually the cairn is named - Douglas's Cairn - and is believed to date from the Bronze Age.

(12) On reaching the top, we find a small cairn of stones.

(13) This three-venue show documents temporary and permanent work at locations across the country based on the cairn , a pile of stones used as a memorial or trail marker.

(14) After half a mile cross the expansive plateau to a high level lochan and the summit cairn .

(15) A chambered cairn

(16) Memorial cairn

(17) After pottering around with compass in hand, I find the summit cairn and then get back off the mountain as quickly as possible, it's bloody cold up there.

(18) It soon became apparent that the row of large stones had defined the edge of a stone cairn covering a boat burial.

(19) Beautifully-crafted and rounded stones act as his cairn .

(20) Stacking large slabs on one another against a spine of uprights within a revetment wall, seems a very effective way to create an illusion of a well built and solid cairn .