About
A Neolithic passage tomb dating to around 3000 BC, Bryn Celli Ddu — 'the mound in the dark grove' — is the best-preserved prehistoric monument on Anglesey and one of the most important in Wales. On the summer solstice, the rising sun shines directly down the passage and illuminates the stone chamber at its heart, a celestial alignment that has worked for 5,000 years. Access is free and the site sits in farmland just off the A4080 near Llanddaniel Fab.
Suitable for
Accessibility
Getting there & parking
Frequently asked questions
Can I go inside the burial chamber?
Yes — you can walk into the entrance passage and view the inner chamber. The passage is low, so you may need to stoop. Bring a torch for the best experience of the interior stonework.
When does the solstice sunrise alignment happen?
Around the summer solstice (approximately 21 June), the rising sun shines directly down the entrance passage and illuminates the back stone of the inner chamber. This alignment has worked for around 5,000 years. Sunrise is typically before 5am at this time of year — arrive well before dawn.
Is Bryn Celli Ddu suitable for children?
Yes — the site is free, open access, and children find the idea of a 5,000-year-old burial mound they can walk into very compelling. The short farm walk adds to the adventure.
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