look on the map, you'll see there's a little grey dotted-line thing down near the bottom; that's what's left of the city walls. I was staying near the rail station, so I walked along the river path, and then over the bridge where there was an old looking tower sitting near the water, and some walls. If you're thinking of York's or Chester's or Canterbury's walls, well, you're not going to be impressed by these. But if you're thinking that you didn't even realize any of the walls had survived at all, then they're wonderful because they're sort of overgrown and lost on this steep hill where the city has put stairs so you can wander up and along the wall and look out over the city and it's just about as perfect a city wall ruins as you could hope for.
These are, in fact, just the sort of city walls that a modern day timid adventurer enjoys, obscure enough that most people won't even notice they're there, but good for getting a bit out of breath on the stairs and feeling like you've found something. Of course, the modern stairs mean that you haven't actually found anything that hasn't been found and put on the map for you, but you get what I mean.
"Swan Pit," the last surviving one in England. At which point I turned to my trusted wikipedia, which uses this very swan pit as its exemplar. I guess it's 18th century?
I wonder what the cygnets would think?
More on the afternoon, to cap it off, so to speak, in a bit!