The eastern end of Hadrian’s wall was at Segedunum Roman Fort on the Tyne estuary, east of Newcastle. The main wall, which at this point was 2.3m wide and 4,5m high met the fort on it’s eastern wall.
A small branch wall then ran down from the south wall of the fort to the river’s edge and a monument situated in the river.
This site had been chosen because it was on a bend in the river and gave excellent visibility in all directions. Fortlets existed on the Northern side of the estuary between Segedunum and the estuary mouth, which was guarded by the fort of Arbeia (modern day South Shields) on the south bank.