South Barrule Celtic Iron Age Hillfort is the largest and thought to be earliest hillfort on the Isle of Man. It stands on the summit of South Barrule (Baarool Jiass) which at its highest point is 1,585 feet above sea level. Enclosed within an inner stone faced rampart were enclosed some 85 or more huts. The site is enclosed by an outer rampart around the summit. Although there have been limited excavations of the site a radiocarbon date of a hearth in one hut gave a date of around 524 BC.