After landing in Dublin we picked up our rental car from Dan Dooley and it was a nice trip up to Knowth and Newgrange in a light drizzle. As one is wont to do in Ireland we did get slightly lost and took a couple wrong turns. Ask me about the reverse gear of our rental car...
We ended up driving up to Slane before coming back south and east to cross the River Boyne. We did eventually get to the Brú na Bóinne Visitor Centre just a few minutes before opening time. We met a German traveler who visits this area every couple years.
We had time to tour the visitor centre before catching our bus to Knowth and then Newgrange. Both passage tombs were constructed over 5,000 years ago (about 3,200 B.C.), making them older than Stonehenge in England and the Great Pyramid of Giza in Egypt.
GPS coord for the center are N53.694567 W6.4463
Direct route map - http://photos.smugmug.com/photos/i-4XSfmwT/0/O/i-4XSfmwT.jpg
Knowth, Newgrange, Visitor's Centre - you can see other mounds too - http://photos.smugmug.com/photos/i-GFQfnt8/0/O/i-GFQfnt8.jpg
For access to the centre, knowth and newgrange you'll pay about 11 euro