As of Monday 14 December all staffed and unstaffed monuments will be closed until further notice.
This is following the announcement of the closure of all outdoor attractions in Wales.
For further information on the Welsh Government’s written statement: Updated Covid-19 control plan for Wales, please visit: gov.wales/written-statement-updated-covid-control-plan-wales
Until we can welcome you back in person, why not explore our 3D world of Cadw sites ...
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.