The Stones of Stenness comprises a circle of 12 standing stones set within a level henge bounded by a ditch and bank. Work on this site started around 3100 BC.
Only five stones survive today, the others having been destroyed over the millennia. In the 1970s the site was excavated by Graham Ritchie who discovered evidence for a variety of settings including a great hearth in the centre.
By standing at the centre of the circle it is possible to see how the angled tops of the surviving stones mirror the hills of Hoy, a clear indication of the way in which these sites related to the wider world around them.