The Earl of Cornwall had a hunting lodge built near the centre of the park, at the foot of the hill overlooking Otmoor to the north. It was fortified with three concentric, rectangular moats. The lodge no longer stands but its moats survive. After Sir John Williams bought the manor of Beckley he had the present Tudor house built, just outside the moats and adjoining the outermost one. Jacobean panelling was added to the parlour in the 17th century but otherwise the house remains very largely as it was built. It is a Grade I listed building. Beckley Park is the home of Amanda Feilding and the main headquarters of her Beckley Foundation, which is doing research on the benefits of certain types of drugs, including cannabis and LSD. The property is not open to the public.