The Taversöe Tuick - or Taiverso Tooack, to give it its correct Orcadian name - is a chambered cairn built into a sloping hillside on the south side of the island of Rousay, Orkney, Scotland. Dating from around 3000BC, what is particularly interesting about this Neolithic cairn is the fact that it is a two-storey structure, with one chamber set on top of the other.