right|thumb|Danks Down, showing a footpath (part of the Macmillan Way) on the left and By Brook in the valley to the right. Long Dean Hamlet in middle-distance.|alt=Green fields and a path on Danks Down North of Ford. A footpath (part of the Macmillan Way) leaves the Castle Combe Road to follow the right flank of Danks Down towards Long Dean. The path runs along the left-hand side of this picture, with the By Brook in the valley to the right and Long Dean hamlet in the wooded area in the middle distance.Danks Down and Truckle Hill is a 13.1 hectare biological Site of Special Scientific Interest in Wiltshire, notified in 1990.