Bryn Celli Ddu
Free Cadw Neolithic passage tomb near Llanddaniel Fab, open in daylight all year. At summer solstice sunrise, light shines down the passage.
Bryn Celli Ddu, the 'mound in the dark grove', is one of Anglesey’s best-known prehistoric monuments. It started as a henge, a bank and ditch around a stone circle, and was later replaced by a chambered tomb under a large earth mound. A long, narrow passage leads into an eight-sided chamber you can step inside.
The tomb is lined up with the sunrise on the summer solstice, when light shines straight down the passage into the chamber, so it gets busy around midsummer. It’s reached on foot from a lay-by along a public footpath through the countryside.
Good to know
Cadw rates the terrain as moderate. The path and site can be muddy or slippery, the ground is uneven and the passage has a low ceiling, so wear sturdy shoes and mind your head. The route shares access with farmland, so you may meet grazing cattle. Dogs are welcome. Cadw doesn’t list toilets or other facilities here.