Parallel mounds show where the wall and possibly interior buildings once were. It's not known what the Romans called these structures or if they had individual names or numbers to identify them. Surely, they must have had something (or else how would the troops have been given directions)? The 44 is a much more recent numbering system and means that this is the 44th such structure coming from the eastern end of the Wall. This particular milecastle appears to have had little or no excavation.
Uploaded to Geograph by Karl and Ali on 22 June 2016
Photo © Karl and Ali, 22 June 2016. Licensed for reuse under this Creative Commons licence