Ruined, but well preserved, Fairlie Tower is a plain 15th century keep of four storeys with a later corbelled-out parapet and bartizans. The walls are pierced by gunloops. The basement is vaulted, and a small stair leads up to the hall and kitchen on the first floor. The castle was built by the Fairlies, but sold to the Boyles in 1650.
Note: Plan to restore Fairlie Castle, by an SCA member, are ongoing.