This neolithic burial site dating back over 5,000 years is unlike anything else in the British Isles.
Consisting of of circle of pairs of burial tombs, the best archaeologists have struggled to fully explain the site for over a century and even today some of the most important questions remain unanswered.
Andrew Johnson (Field Archaeologist at Manx National Heritage) here explains the site, some of its key features and what we might learn of life thousands of years ago through what remains today.
This film was one of two produced by Culture Vannin to accompany the book co-authored by Andrew Johnson and published in 2017: 'A Guide to the Archaeological Sites of the Isle of Man'.
The other film, about one of the earliest remaining Christian buildings in the Isle of Man, can be enjoyed here: Lag ny Keeilley.