Maes Howe & The Standing Stones:

The Orkney Islands features a huge area of ceremonial sites with standing stones and chambered burial cairns, built 5,000 years ago. We visit the ancient sites of the Ring of Brodgar, the Standing Stones of Stenness and Maes Howe in Orkney with local historian Sarah Jane Grieve. She tells us what historians believe they were used for and how they would have been built.