BIVALLATE RATH AND Man-made underground passage: CORLISS FORT or THE BEECH FORT or DONAGHY'S FORT in Corliss

Donaghy's Fort in Corliss, County Armagh, is a bivallate rath with a man-made underground passage, recorded for the Christian era and protected as a scheduled monument. The double rampart suggests a place built to keep out or hold back, while the hidden passage implies someone also wanted to leave, hide, or enter without being seen. It may have served as a stronghold, a refuge, or a boundary marker for a local family, but the underground route gives it a darker edge: a fort is not only a wall, it is also a trap for whoever cannot find the way through.