One Moment in Time: The Winter Solstice Seen from Newgrange -

Deep inside the world’s oldest known building, every year, for only as much as 17 minutes, the sun — at the exact moment of the winter solstice — shines directly down a long corridor of stone and illuminates the inner chamber at Newgrange.

https://americandigest.org/one-moment-time-winter-solstice-seen-newgrange/

Very cool!