The Giant's Ring dates from the Neolithic period and was built around 2700BC. The site consists of a circular enclosure, 180 m (590 ft) in diameter and 2.8 hectares (6.9 acres) in area, surrounded by a circular earthwork bank 3.5 m (11 ft) high. At least three of the five irregularly spaced gaps in the bank are intentional and possibly original. East of the centre of the enclosure is a small passage tomb with a vestigial passage facing west.