Guthrie Castle is a 15th-century tower house in Angus, Scotland, combining a 1468 tower with 19th-century extensions including a Tudor Gothic wing and mansion addition designed by architect David Bryce. Set on 156 acres of natural beauty, the estate features a horseshoe walled garden dating to 1614, a private nine-hole golf course, and distinctive grounds including a Celtic Cross-shaped hedge. The castle operates as a private venue for exclusive events and residential seminars, though it is not open to the public as a hotel or tourist attraction.