Each passage at Knowth has a highly decorated entrance stone & a large standing stone in front of the entrance. The decorated stones have a vertical line on them & the shadow of the standing stones cast a shadow on the line at sunrise (East) & sunset (West) on the dates of the equinoxes. 3/

Knowth is slightly older than Newgrange, and unlike Newgrange, the site was in more or less continuous use from at least the Neolithic thru the Middle Ages. That means the site is far more disturbed than Newgrange—but it also has the most megalithic art in Europe—nearly every large stone that 4/

Oh! Knowth is the one we went to see. Though I don't recall it as having that damage then (30 years ago).

So cool.