Grabbist Hillfort
Grabbist Hillfort is an Iron Age oval hillfort or defended enclosure, west of Dunster in Somerset, England. The site is  long and  wide, and is surrounded by a counterscarp, which measures  in height. It is also surrounded by a ditch, which ranges up to  wide and  deep. The bank has a peak height of , and, on the northern and western sides, there is a second bank, which leads to the northeastern corner being the most strongly defended. Ploughing over the years has damaged or erased some of the original features including a possible inner rampart. If it was a hillfort it is believed to be unfinished. An area just below the site is known as the "Giant's Chair" which is a depression formed by land slippage. The site is designated as a scheduled monument. References 

Hill forts in Somerset
Scheduled monuments in West Somerset
Iron Age sites in Somerset