The Dwarfie Stane on Hoy is a rare example of a rock-cut tomb in the British Isles, the only comparable site being in the Wicklow Mountains, Eire.
It is thought to date from around 3,000 BC, although this is uncertain and nothing is known about what the contents of the tomb may have been.
The name comes from the Norse settlers who called it 'Dvergasteinn'. According to Norse legend, the dwarves lived in hollowed-out boulders or in hillsides.
The size of the stone is 9 metres by 5 metres by 2 metres. A passage has been cut into the rock, and off this passage are two cells.
The first mention of the stone if from an early sixteenth century description of Orkney.
It also gets a mention in Sir Walter Scott's The Pirate.
To the map of Orkney.