On the way from Bellewstown to Herbertstown I nearly collided with these. They are not marked on the OS map sheet 43. Three large, squat megaliths sit there in the middle of a triangle that splits a y-shaped junction. They are said to be the remains of a stone circle on archaeology.ie but no other details are given. A nice curiosity, though I remembered seeing them on Megalithomania.com some years back.