Dougbowski was spot on - this is the entrance to the Victoria Tunnel that can be found outside the Hancock/Great North Museum on Claremont Road.
Today’s question! This sign says ‘This boundary mark is one of many erected in the 18th century to define the Town Moor, Nuns Moor and Castle Leazes. It now marks the approximate position of the south east corner of the Town Moor and is erected here to remind the citizens of Newcastle upon Tyne of the extent of their heritage.’
Where can this boundary mark be found?

I don’t suppose saying “the south east corner of the Town Moor” is enough?
If it was *right* it would have been enough, but I might have asked a more specific question in that case :)
Re: Victoria Tunnel - I can’t believe I used to live so close to such a special site without ever hearing anything about it! What a fascinating monument. From the link you gave, I understand that it was closed for most of my time on Tyneside (2003/04). I’m gutted not to have seen it nevertheless!
I’d never heard of it until one of my friends told me about it, and I’d been in Newcastle quite some time then. I’m so glad they’ve opened it up to the public. It was an amazing experience.
There’s one at the Civic Centre, but I could have sworn that was ‘wall mounted’ for want of a better phrase!
That’s the one - so far you’re the only one with any points!!! Doing well!
I think you have got it, Doug but it isn’t wall mounted.