The Brú na Bóinne World Heritage Site in County Meath (Contae na Mí) in the east of Ireland, is a remarkable place. It is famous for the three passage tombs, Knowth, Newgrange and Dowth, built some 5,000 years ago in the Neolithic or Late Stone Age. Ninety monuments have also so far been recorded in the area. Recently the exceptionally dry weather experienced in Ireland has provided the conditions necessary for the site of a hidden henge to be seen.