Hadrian’s Wall, Vallum Aelium, Vallum Hadriani
Segment I
Segedunum to Pons Aelius
Wallsend to Milecastle 4
Mile castles: 1 to 4
Built: 122-128
Segment Length: 3.4 miles, 5.5 km
This area has been completely overbuilt and there are no traces of the wall to be seen.
See: http://www.northofthetyne.co.uk/HWC1.html
https://en.wikipedia.org/wiki/Hadrian%27s_Wall
http://structuralarchaeology.blogspot.com/2010/11/40-reverse-engineering-vallum.html