This site is now open to view or visit.
In line with Welsh Government advice and guidance, we have started to reopen a selection of our unstaffed heritage sites in a safe and controlled way — for the benefit of local communities.
We are pleased to announce that this monument is now open and is free to view or visit with no pre-booking required. Please adhere to our new visitation guidelines, act responsibly and be respectful towards the site and its local area at all times.
Site opening times, parking and other available facilities at our reopened sites may have changed. Please check this site’s webpage carefully for specific updates.
For further information on what to expect and how to stay safe during your visit, please read our FAQs page.
A spectacular feat of prehistoric engineering
This Neolithic (New Stone Age) tomb is topped with one of largest capstones in Britain. Measuring a massive 24ft/7m by 15ft/4.5m and weighing around 40 tons (as much as an articulated lorry), how on earth did the builders get it up there? Experts reckon that at least 200 individuals would have been required to hoist it into place. Excavations have uncovered the remains of over 50 people, along with broken pottery and flint tools.
The site is also associated with a number of legends – it’s said that anyone who spent the night here on the evenings before May Day, St John’s Day (23 June) or Midwinter Day would die, go mad or become a poet.