(07 Mar 2016, 4:29 pm)South Tyne Lad wrote Sounds like a good challenge, I'm planning to go on the X21 after school on Friday because I'm in Edinburgh on Saturday.
Might have a go at Durham Cathedral if that counts.
The castle's just next door!
It's a hard one to get a good shot of, though. Its most impressively photogenic side overlooks the river.