Challenge: Wall (but not just any old bit of wall)

Some friends and I are trying our hand at a 30 day challenge to keep the blipping going. Today's challenge is Wall. So most of you will be familiar with the piece of Hadrian's Wall that Kevin Costner's Robin Hood took a serious detour to on his way to Nottingham, but most of you will be less familiar with this piece of the wall located on a Benwell housing estate within walking distance of my house! This is the Benwell Vallum Crossing, a great bit of wall indeed and thank you CT for telling me where to find it. Whoever knew it was there?