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.
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