Gylen Castle at the south end of the island of Kerrera in Argyll and Bute, Scotland

Gylen Castle is a very small castle, or tower house, at the south end of the island of Kerrera in Argyll and Bute, Scotland, on a promontory overlooking the Firth of Lorne. Built in 1582 by the Clan MacDougall. It was made a scheduled monument in 1931. Gylen was only occupied for a relatively short time. The castle was besieged then burned by the Covenanters under General Leslie in 1647 during the Wars of the Three Kingdoms.