A chambered cairn built about 5300 years ago.
People were buried here and the passage was intended to allow their living ancestors to visit them. Radio carbon dating has shown these peopel died about 3350-3150 BCE
Fragments of about 30 pots have also been excavated.
The mound remained sealed for centuries until it was excavated by Robert Clouston in 1884. The chamber is accessed by a very low passage which opens into the main chamber.
Due to the risk of damage/collapse the chamber roof was removed and replaced with a (slightly) higher concrete dome.
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