The remains of the roman Castle can be visited
Ancient BuildingBirdoswald
Roman Fort Banna

Banna, now known as Birdoswald Roman Fort, was a fort, towards the western end of Hadrian's Wall, in the Roman province of Britannia. Today the site is occupied by a former farm called Birdoswald.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Ozymandias
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 54.9895, -2.6030