Despite the alternative name this site is (only just) beyond the Unstan chambered cairn . Shown on the map as a fort and on CANMORE as a scheduled defended promontory (NMRS record no. HY21SE 22 at HY28211176). But rather than a promontory fort it is simply described as a promontory earthwork which might be an example of "Scandinavian ness-taking" . Best surviving on the E side it says , a causeway on the NE corner marking the entrance . The centre having been destroyed by cultivation I see no reason for it not to have had pre-Norse uses e.g. broch or other settlement .CANMAP for some reason places it in the loch !