Man-made underground passage in Ardabrone

Located to S of centre in the interior of Ardnabrone rath (SL013-057001-) within a small quarried out area (dims. 6m N-S; 8m E-W; D 0.8m). A large lintel consisting a rectangular limestone slab (L 2.65m E-W; Wth 1m; T 0.25m) has been exposed. The first entrance (Wth 1.2m; H 0.2m) to the Man-made underground passage faces S and lies 0.7m to the N of the mid point of the exposed lintel. The second entrance (Wth 1.2m; H 0.15m) to the Man-made underground passage faces E and lies under the W end of the exposed lintel. Both entrances are too narrow to allow access to the passage. Compiled by: Mark Keegan Date of upload: 19 January 2011