Blackness Castle
This mighty fortification, jutting out into the Firth of Forth with its long and narrow design, has been described as ‘the ship that never sailed’. It owes much of its nautical shape to the many fortifications that were added to it during the 16th century, transforming it into one of the most secure fortresses of its time – part of its south-facing wall is 5.5 metres thick! Now a popular visitor attraction, the castle has served as a garrison, state prison and also featured in season one of Outlander and more recently in Outlaw King.