Visiting Bryn Celli Ddu takes you back to the Neolithic period, 5000 years ago when farming had come to Britain . Cadw who look after this monument describe it as the best known prehistoric monument on Anglesey and one of the most evocative archaeological sites in Britain.You have a wonderful opportunity to go inside a Neolithic tomb burial chamber. Inside the mound is a narrow passage which ends in a small chamber where human bones, arrowheads and carved stones were found. If you visit Bryn Celli Ddu before sunrise on the longest day of the year, aka the summer solstice, you will see that the rising sun’s rays shine directly down the passage way to illuminate the chamber where the human remains were once placed. This is the only example of this alignment in Anglesey.