The
Unstan cairn viewed from the centre of the Stenness ring.
The small white dot is the information plaque and the black rectangle beside it
is the cairn entrance passage. We checked the bearing of the passage
during our visit at Unstan and it is 70 degrees True, this is the exact bearing
of the Stenness circle. A spot-on match like this in unlikely to be
chance, so
the cairn passage may well have be orientated towards the circle.