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 ...
Iconic Neolithic tomb with a celestial secret
One of Anglesey’s most famous prehistoric landmarks, Bryn Celli Ddu (the ‘Mound in the Dark Grove’ in English) is actually two sites in one. In the early Neolithic (New Stone Age) period, a henge (bank and ditch) enclosing a circle of stones was built here, to be replaced later by a chambered tomb beneath a mound measuring up to 85ft/26m in diameter. Inside, a long, narrow passage leads to an octagonal chamber 8ft/2.4m across, where artefacts such as human bones, arrowheads and carved stones have been found.
But Bryn Celli Ddu’s most unusual feature can only be seen once a year. As the sun rises on the summer solstice (the longest day of the year) shafts of light shine directly down the tomb’s passageway to illuminate the chamber within.
Postcode LL61 6EQ
For further information, please contact: Traveline Cymru on 0800 464 0000 or National Rail Enquiries on 03457 48 49 50.