5. **Winter Solstice Alignment**: One of Newgrange's most e…

5. **Winter Solstice Alignment**: One of Newgrange's most extraordinary features is the roof box above the entrance. During the winter solstice, when the sun rises, its light streams down this box and illuminates the passage and the tomb's inner chamber. This event lasts for about 17 minutes, symbolizing perhaps a rebirth of the sun after the shortest day of the year.