This has been identified as the site of a possible promontory fort.  A possible rampart, has been described, with a built-up entrance to the west.  It has been speculated that it may be of both Iron Age and Early Medieval date. Across this neck of the promontory is a linear rock outcrop with evidence of the artificial infilling of some gaps, one of which is up to 30 metres long, with an inner height of 2.0 metres. A second gap was 1.5 metres wide, with an inner height of 0.6 metres, and may originally have served as an entrance point.  From the rock outcrop the land slopes steeply down to the north, falling away by some 5.0 metres.  There is no visible trace of an outer ditch, any internal structure or a definite entrance. The site cannot be compared to any other known examples on the island except for its size, which is comparable to the Early Medieval forts.