Orkney Museum notice says it all
“The following is a list of Orkney 2012 archaeological excavations that the OAS has been made aware of.” All those islands, all those archaeologists and all those sites, you can never be quite sure if you’ve got every one. Here are some views.
This is one of Rik Hammond’s works, see Symbols in a Landscape 2011/12: Orkney Art & Archaeology Artist Residency. The dig has an excellent blog.