Tags: World Heritage Site.
Knowth (/ˈnaʊθ/; Irish: Cnoghbha) is a Neolithic passage grave and an ancient monument of Brú na Bóinne in the valley of the River Boyne in Ireland.Knowth is the largest of all passage graves situated within the Brú na Bóinne complex. The site consists of one large mound (known as Site 1) and 17 smaller satellite tombs.