Dowth (Irish: Dubhadh) is a Neolithic passage tomb located in the Boyne Valley, County Meath, Ireland that dates from about 2,500 – 2000 BC. It is the second oldest behind Newgrange of the three principal tombs of the Brú na Bóinne World Heritage Site – a complex of passage-tombs (the others being Newgrange and Knowth). It is less developed as a tourist attraction than its neighbours, partly because the chamber is much lower, and partly because the decoration is poorer.