Harray Loch
Crossing from the Stones of Stenness to the Ring of Brodgar I remember reading about Stenness Loch and how surveying the floor of the loch suggested that the area had been a mixed terrain, including marshy ground and possibly some neolithic features. The discussion followed with the observation that as sea levels rose the sea water from the North Sea flooded through the Bridge of Waithes. In this way there is a separation between the two lochs where the Harray Loch is fresh water, and the Stenness Loch is salty. As there is a gap, a passage of water, separating the Brodgar peninsula from the stones of Stenness and Maeshowe location, is it possible that early in the Neolithic period people came to this place and built a dam to block rivers flowing between Harray and Stenness to make it easier to get to the peninsula from Barnhouse, incidentally creating the fresh water lake?