Turret 56B (Cambeck) (grid reference NY51236394) is situated about 140 metres east of the Cam Beck on a river terrace.[3] It was located in 1933 and measured 6.2 metres across.[5] It projected 0.8 metres in front of the line of Hadrian's Wall, and is assumed to have originally belonged to the Turf Wall.[5] There are no traces of the turret visible above ground.[5]
The site of the Roman fort at Castlesteads (Camboglanna) is situated 440 metres south of Turret 56B.[6]