Two significant archaeological sites were found here by a farmer on his land. The first is a Bronze Age stone building with a firepit, indoor well and plenty of seating (a communal cooking site or the original Orkney pub?). Beyond, in a spectacular clifftop position, the neolithic tomb (wheel yourself in prone on a trolley) is an elaborate stone construction that held the remains of up to 340 people who died some five millennia ago.
An excellent personal explanation is given at the visitor centre; you meet a few spooky skulls and can handle some of the artefacts found, plus absorb information on the mesolithic period. It's about a mile's airy walk to the tomb from the centre, which is near Burwick.