The south-western promontory of Dun Mingulay has the remains of an Iron Age fort and there is a pre-historic site at Crois an t-Suidheachain near the western landing place at Aneir at the southern end of Mingulay Bay, which may have been a stone circle. In 1971 a 2,000-year-old Iron Age midden was found resting on sand near the 'Village' overlooking the Bay. A stone 'pebble hammer' was discovered nearby in 1975, but it has not been possible to date the find. Skipisdale may also contain Iron Age remains.