Coflein also mentions the enclosure at the south end (and above) the row:
An avenue some 90m long comprising two roughly parallel but sinuous lines of small stones leading NNE from the foot of a natural scarp to the top of a steep-sided hollow leading down the cliff. A short distance to the S is a roughly rectangular enclosure bounded by walls of large limestone blocks. Its relation to the avenue is uncertain. The S side has been disturbed by ancient cultivation.