I knew you would have to pay to go to the actual momument. BUT there is a limit to how many people can to in or even to the outside of it--you have to take a bus from the visitor center that only leaves at certain times. It is an automatic hour and a half guided tour.
We got there at 2:30 pm and the next guided tour (the only way to see it) didn't leave for another hour and a half. Plus, when you are on the tour, you have to stay for the hour and a half duration. We didn't have 3 hours to spend, so we couldn't do it. If you want to sneak out to the place where the busses take off you can trespass and walk through locals sheep fields all the way to the monument, but if you don't come in a bus they'll ask you to leave the area. Same goes for driving there, there is a backroad that makes it possible, but you drive up in a car, you have to leave.
If you just want to see the outside, walk or drive up, get your picture, go. But no way are you getting inside without a ticket and a busride!
When you are driving around to find New Grange, you have to follow a strange sign to get there. You will see a sign pointing you towards the New Grange Farm and beneath it is saying: "No access to the monument".
Just follow that sign if you want to go to New Grange, because the monument is laying 100 metres before the farm. You will not see any signs that point you towards New Grange and there is a reason for that.
You will be denied access to the monument if you turn up by car. You will have to buy a ticket in the visitor centre and then you can go with a mini buss towards the monument. When we turned up at the monument, they told us this and the visits for that day where already fully booked.
So book your tickets in advance or wait until after the tourist season.
The Brú na Bóinne Visitors Centre is located near the village of Donore, Co. Meath and is the starting point for guided tours of Newgrange and Knowth.
Directions to Brú na Bóinne Visitor Centre from Dublin
Via the M1 Motorway: Take the M1 heading north, leave the motorway at the Donore Exit near Drogheda, (Brú na Bóinne is clearly signposted before the exit). There is a toll of 1.50 Euro before the Donore exit. Travel about 6km (4 miles) to the village of Donore, turn right passing Daly's Brú na Bóinne Bar and Restaurant on the right, travel about 1km, the Visitor Centre cark park is on the right hand side.
Via the N2: Take the N2 heading north via Ashbourne towards Slane in Co. Meath. Turn right about 2km south of Slane, the Brú na Bóinne Visitor Centre is 7km (4.5 miles) east towards the village of Donore. For about 3km before the Visitor Centre the road follows the bend in the river Boyne.
Knowth, was about the same age as Newgrange, but the mound isn't as big (in fact there are lots of mounds) and you can't go in. In addition, someone has built a house that blocks the sun near the winter solstice so even if you could go in, the impressive light display doesn't work. So if you get a chance go to Newgrange first, and if you have to pick one of the two to visit, go to Newgrange. Go to Newgrange early or you may find the tours already booked