This monument is open and free to visit with no pre-booking required.
Check our opening times and facilities below; please act responsibly and be respectful of the local area during your visit.
Please adhere to Welsh Government social distancing guidelines and coronavirus restrictions at all times and do not attempt to access enclosed spaces.
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.
Last admission 30 minutes before closing
Closed 24, 25, 26 December and 1 January