In one of the fields is a portal tomb. The Drumanone Dolmen (portal tomb) is just west of the town. The northern cairn is a dolmen (portal tomb) with the capstone missing. Poulnabrone is the largest Irish portal tomb after Brownshill Dolmen in County Carlow. The Knockeen Portal Tomb has five large uprights and two capstones in total. The Knockeen Portal Tomb is a megalith in Knockeen, County Waterford, Ireland. Proleek Dolmen is a dolmen (portal tomb) and National Monument located in County Louth, Ireland. Kilmogue Portal Tomb stands on the eastern slopes of Brown Mountain, northeast of Mullinavat. Ballynageeragh Portal Tomb is a dolmen and National Monument situated in County Waterford, Ireland. The portal tomb at Larch Hill and the Brehon's Chair are on privately owned land.