Each milecastle on Hadrian's Wall had two associated turret structures. These turrets were positioned approximately one-third and two-thirds of a Roman mile to the west of the Milecastle, and would probably have been manned by part of the milecastle's garrison. The turrets associated with Milecastle 43 are known as Turret 43A and Turret 43B.
Turret 43A
Turret 43A was located by exploratory excavation in 1912. The site is overlain by turf-covered spoil from the Wall, and no remains of the turret can be seen.
Turret 43B
Turret 43B was also located by exploratory excavation in 1912. There are no visible remains.