The Dolmen of Annadorn is located near Loughinisland, on the northeastern shore of Loughinisland Lake, in County Down, Northern Ireland. The dolmen sits on a hill, overlooking the Loughinisland Churches, a group of three ruined churches.
The type of megalithic structure is uncertain as the site has not been excavated. One explanation suggests that the three supporting stones, now lying about 60 cm high on the ground, were once upright and supported the approximately 65 cm thick capstone. J. Fergusson (1808–1886) coined the term “Tripod-Dolmen” for this sub-type of the portal tomb. It is applied to dolmens in the region that feature a capstone resting on three supporting stones (examples include Ballykeel, Legananny, and Proleek).
According to a description published in 1802, the dolmen was originally covered by a high stone mound and accessed through a covered passage. If this description is reliable, it would indicate a type of passage tomb, although its chamber would be very low and atypical, resembling a group of difficult-to-classify dolmens found mainly in Connemara, Ireland.
