Newgrange

Expect to see no less than one of the most spectacular prehistoric tombs in Europe when you come to Newgrange. Built in the 4th millennium BC—which makes it roughly 1,000 years older than Stonehenge—Newgrange was constructed with some 250,000 tons of stone, much of which came from the Wicklow Mountains, 80 km (50 miles) to the south. The Brú na Bóinne Visitor Centre, near the village of Donore, is the starting point for all visits to and tours of Newgrange and Knowth. Arrive early if possible, because you can't book ahead of time and Newgrange often sells out in high season.