Maeshowe, also known as Orkhaugr, a burial mound in Orkney, Scotland, with underground passage graves. It was built during the Neolithic period, about 3000 years ago. It has been included in the World Heritage Site, Heart of Neolithic Orkney.
The mound used to be taller, with a depression in the top, looking like a small volcano. It measured 11 meters in height and had a diameter of 30 meters. This was changed in 1861 when the mound was dug into by archaeologist James Farrer.