|Boscawen-Un is a Bronze age stone circle close to St Buryan in Cornwall, UK. It consists of 19 upright stones in an ellipse with diameters 24.9m and 21.9m, with another, leaning, stone just south of the centre. There is a west-facing gap in the circle, which may have formed an entrance.|
The leaning stone aligns exactly with the centre stone at the Mŕn-an-Tol and the church at nearby St Buryan. While this may conceivably be coincidental, the precision of the alignment suggests an intentional positioning of the three structures in relation to each other.