News of this discovery in Lismullin has been shrouded in secrecy. The entrance to the henge is facing Tara. It is not known if it is a wooden or stone henge.
For those of you unfamiliar with henges, here is the Wikipedia definition:
Henge - http://en.wikipedia.org/wiki/Henge
A henge is a prehistoric architectural structure which consists of nearly circular or oval-shaped flat area over 20 metres (65 feet) in diameter that is enclosed and delimited by a boundary earthwork that usually comprises a ditch with an external bank. The earthwork permits access to the interior by one, two, or four entrances. Internal components may include portal settings, timber circles, post rings, stone circles, four-stone settings, monoliths, standing posts, pits, coves, post alignments, stone alignments, burials, central mounds, and stakeholes (English Heritage definition).
Because of the defensive impracticalities of an enclosure with an external bank and an internal ditch (rather than vice versa), henges are considered to have served a ritual, rather than a defensive, purpose.