There are prehistoric fort sites at promontories near Kilmory, Papadil and Glen Shellesder of uncertain date. These primarily consist of a wall dividing the promontory from the rest of the island, but at Kilmory, there is also a rampart with a hollow containing the traces of an interior structure. At Shellesder, the promontory contains the remains of three round stone-walled huts, one of which integrates with the dividing wall. A small number of cairns, again of uncertain date, are also located along the coast.