Man-made underground passage in Ballyannan

The 'cave' marked on the 2nd and 3rd editions of the OS 6-inch maps is now inaccessible and its exact location unknown. It was situated in grazing land sloping S to a river NW of a section of rock outcrop. The above description was derived from the 'Archaeological Survey of County Donegal. A description of the field antiquities of the County from the Mesolithic Period to the 17th century.' Compiled by: Brian Lacey with Eamon Cody, Claire Cotter, Judy Cuppage, Noel Dunne, Vincent Hurley, Celie O'Rahilly, Paul Walsh and Seán Ó Nualláin (Lifford: Donegal County Council, 1983). In certain instances the entries have been revised and updated. Date of upload: 22 September 2008