The Callanish VIII stone setting is one of many megalithic structures around the better-known (and larger) Calanais I on the west coast of the Isle of Lewis, in the Outer Hebrides (Western Isles), Scotland. It is also known locally as Tursachan.
This is a very unusual (and possibly unique) setting, with a semicircle of four large stones on the edge of a cliff on the south of the island of Great Bernera and looking across a narrow strait to Lewis. There is no evidence that the cliff has collapsed here and destroyed half of a complete circle – it would appear that a semicircle was the original intention. The tallest stone is nearly three metres high and the cliff-edge axis of the circle gives a diameter of about 20 metres.
- "Great Bernera, 'Tursachan', Barraglom" RCAHMS. Retrieved 22 June 2008.
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