Bryn Celli Ddu Burial Chamber

Visitor Notice

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.

Overview

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.

More about Bryn Celli Ddu