Davaar Island.

The volcanic outcrop which sits at the mouth of Campbeltown Loch is joined to the mainland at low tide by a stretch of shingle known as the Dhorlinn. Check out the tide times from the tourist information centre on the pier before you attempt to make the crossing as there have been a number of people either marooned on the island, or even worse, caught by the tide when halfway across. It's the site of the cave painting of Jesus on the cross, created by Alexander MacKinnon (no relation) in 1887.