A short distance from Rousay's Taversoe Tuick Chambered Cairn, and built into a steep slope overlooking Wyre Sound, is the Blackhammer stalled cairn. Thought to date from around 3,000 BC, the structure is a typical stalled cairn, with an interior divided into seven compartments by pairs of upright stone slabs. Today, a modern roof covers the original remains of the cairn, which are are only a few feet high. Windows built into this concrete construction supply ample light to explore the site.