Bryn Celli Ddu

Bryn Celli Ddu is a prehistoric monument located on the Welsh island of Anglesey, off the northwest coast of Wales. The name "Bryn Celli Ddu" means "the mound in the dark grove" in Welsh.

The monument consists of a circular burial mound that is surrounded by a ring of stones. The burial mound is approximately 8 meters in diameter and 4 meters high, and was built around 5,000 years ago during the Neolithic period. Inside the mound, archaeologists have discovered a central stone burial chamber that is accessed by a narrow passage.

The site was first excavated in the late 19th century, and further excavations were carried out in the 1920s and 1950s. Archaeologists have found evidence of both human and animal remains within the burial chamber, as well as artifacts such as pottery and flint tools.

One of the most interesting features of Bryn Celli Ddu is the alignment of the entrance passage with the rising sun on the summer solstice. During this time, sunlight shines directly down the passage and illuminates the interior of the burial chamber. This suggests that the monument may have been used for ritual purposes related to the cycles of the sun and the seasons.

Bryn Celli Ddu is open to visitors, and there is a small interpretive center on site that provides information about the history and significance of the monument. It is a fascinating and mysterious monument that provides a glimpse into the religious beliefs and practices of prehistoric people in Wales.