Lough Doon Ring Fort is located on a small island in Lough Doon off the Portnoo to Rosbeg Road. It is an impressive 4.8m high walled enclosure, covering the small island completely, traditionally built 1000BC. During the holiday season (summer) there are small boats available for hire to allow access to the island for a closer look. This ancient ruin is evidence that this area has been inhabited for many centuries. In recent years the gold Lunula (a fine piece of decorative jewellery), dating from 1600BC approx., was found in this area and is displayed in the National Museum of Ireland. A replica of this can be seen in the Local Dolmen Centre.