The island provides good shelter to a natural harbour which is overlooked by the village of Isleornsay. The "Ornsay" lighthouse stands on the neighbouring islet, Eilean Sionnach.[7] After the lighthouse was automated, Eilean Sionnach Lighthouse Keeper's Cottage became privately owned and is now let as holiday accommodation.
Lighthouse
The lighthouse was built in 1857 by Thomas and David Stevenson. It is a masonry tower with a gallery, lantern and keeper's house. The apparatus entered service on 10 November 1857. The lens system was improved in order to show the light strength according to the distance to be shown.[clarification needed] The lighthouse is equipped with a fourteen-day battery backup to keep the emergency light working. It was modernized in 1988 when mains power was installed. The lighthouse emits a white occulting light every 8 seconds and was automated in 1962.[8]