Winter Solstice at Newgrange.
Check out MythicalIreland.com. Here’s a little bit of what they had to say:
“On the Winter Solstice, the light of the rising sun enters the roofbox at Newgrange and penetrates the passage, shining onto the floor of the inner chamber. The sunbeam illuminates the chamber of Newgrange for just 17 minutes…” http://www.mythicalireland.com/ancientsites/newgrange
According to Mythical Ireland.com: “The Tuatha Dé Danann, who ruled Ireland in ancient mythology, were said to have erected Newgrange as a burial place for their chief, Dagda Mór, and his three sons. Newgrange was said to have been the place where the great mythical hero Cúchulainn was conceived by his mother Dechtine. His spiritual father, Lugh, visited Dechtine in a dream while she stayed at the Brugh…”http://www.mythicalireland.com/ancientsites/newgrange/
Photo by Fran Caffrey from the website http://www.mythicalireland.com/ancientsites/newgrange/illumination.html