The structure a rectangular tower containing a narrow spiral staircase. The only part remaining intact is the basement, the entrance of which is in the north-east corner, and the base of a turnpike stair. There was a tunnel from the building to Colinton Tower which was accessible until the 19th century. The castle is on a promontory. There is a ditch to the south of this, about two metres deep, where an inner rampart may have been. It is thought that a
barmkin once surrounded the site, while other buildings probably stood between the tower and the ditch. ==Tradition==