Don’t head all the way out to Newgrange, Co. Meath without taking Knowth into account. Both these Neolithic passage tombs are located in the Boyne Valley, and comprise part of the Brú na Bóinne World Heritage Site. Constructed by local farmers in 3,200 BCE, the introduction of agriculture meant they could live at a location permanently. These types of settlements would have taken years to build. Newgrange has a single chamber and three surrounding satellite tombs that have been restored. Even though Knowth isn’t restored, the central mound has one…