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.