Aydon Castle was originally a 13th century timber-framed manor house, founded by Hugh de Reymes. Sited with three sides standing against the steep banks of the Cor Burn, in 1305 Robert de Reymes fortified the manor with battlements and walls, after King Edward I granted him a licence to crenellate. Early in the 14th century, an outer curtain wall with a plain arched gateway was added and the open side is flanked by a rectangular tower and 14th century D-shaped angle tower. The two storey hall block and kitchen wing with an embattled curtain wall make an inner courtyard, with the remnants of a middle courtyard to the west. But the defences were not strong enough to stop the Scots, sacking the manor in 1315 and 1346. In the 18th century, the manor became a farmhouse and because of this, the hall is now one of the finest and most unaltered examples of its era. A mile north is Halton Castle and 7 miles east is Lonkins Hall.