What's awesome is this: http://en.wikipedia.org/wiki/Newgrange http://en.wikipedia.org/wiki/Newgrange Built between 3100 and 2900 BC: at the winter solstice th

What's awesome is this: http://en.wikipedia.org/wiki/Newgrange http://en.wikipedia.org/wiki/Newgrange Built between 3100 and 2900 BC: at the winter solstice the chamber inside is illuminated by the sun.