Sligo. The hill is particularly important for the two possible passage grave structures atop it. The largest example is Cairn A (or Carn Caille), marking the highest physical point of the hill with a diameter of 18 m and height of 3 m. Reference to that cairn does not appear until 1960, when Ordnance Survey Ireland installed a trigonometrical station, partially damaging the cairn. An excavation took place before installation, with cremated bone recovered from a central rectangular chamber. Thanks to the advent of Global Positioning System technology, the trigonometrical station is now redundant. The second cairn, Cairn B, is about 50 m to the north of Cairn A, with a 9 m diameter and difficult to identify due to the extensive coverage of peat and heather. Folklore Cairn A (or Carn Caille) has two legends associated with it. The first refers to the location of the burial place of Queen Maeve's nephew and murderer, Furbaide Ferbend on the summit of Sliabh Uillen (Cairn Hill). One of the cairn on Sliabh Carbry (in Cairpre Gabra) was indeed anciently called "". The second legend refers to Cairn A (or Carn Caille)and its creation by the Cailleach a Bheara or ancient Hag/Witch who dropped stones out of her apron as she flew over the hill. This legend is also associated with many Passage grave sites throughout the island of Ireland, such as Carrowmore, Co. Sligo and Carrowkeel, Co. Sligo. See also Lists of mountains in Ireland List of Irish counties by highest point List of mountains of the British Isles by height List of Marilyns in the British Isles Pictures References Primary Secondary External links Map of Ireland Viewer Walking Ireland's County Tops Mountains and hills of County Longford Highest points of Irish counties Marilyns of Ireland