As the map below shows, the island of Anglesey is richly endowed with prehistoric sites.
We recently visited one of the best of these: Bryn Celli Ddu, in a field a few miles west of Menai Bridge, indicated on the map by an orange pointer.
It is a burial chamber dating from the Neolithic period, about 4000 years ago. There is a mound with an entry at the eastern end,
from which a short distance bent double brings you to the central chamber, where there is room for half a dozen people to stand upright.
The roof has been supported by concrete beams. There is what appears to be an upright monolith, but we were told it was actually a petrified tree trunk.
Who built Bryn Celli Ddu and the other ancient constructions on Anglesey? Nobody knows.
