Aghnaskeagh CairnsAghnaskeagh Cairns is a chambered cairn and portal tomb forming a national monument in County Louth, Ireland.LocationAghnaskeagh Cairns are located south of Slieve Foy, to the west of the N1.History and archaeologyThe two cairns may have been connected by a gallery.Portal tombThe northern cairn is a dolmen with the capstone missing. Two portal stones and a back stone remain. Six Bronze Age cist burials were later added. Archeologists found potsherds, cremated bone, food vessels and a blue glass bead on the site, as well as the remains of blackberries under one of the cists, presumably as grave-goods.Chambered cairnThe southern cairn is a chambered cairn with four cists at the eastern end. Excavations revealed cremated bone, potsherds and scrapers. A burial was also made here in the early Christian era.