Gylen Castle is a compact but impressive tower house built in 1582 by the MacDougall clan on the island of Kerrera, near Oban in Argyll, perched dramatically above sea stacks overlooking the Firth of Lorn. The castle had only a brief occupation; in 1647, during the Wars of the Three Kingdoms, Covenanters led by General Leslie besieged and set fire to the structure. Designated a scheduled monument in 1931, Gylen underwent comprehensive restoration in 2006 with funding from Historic Scotland and Clan MacDougall members worldwide. Today it remains a free-entry ruin open for exploration, accessible via a five-minute ferry crossing from Oban and a scenic island walk. Below the castle lies a beautiful bay and beach area, making the site an ideal destination combining castle exploration with outdoor recreation and views of Scotland's dramatic western coastline.