Salisbury cathedral clock
en.wikipedia.org
en.wikipedia.org
But that whole area is fascinating. Stonehenge is a short drive North. A slightly longer drive North gets you to Avebury.
Much closer is Amesbury, which has Blick Mead on the outskirts, with evidence of occupation from nearly 9000 years ago.
http://www.buckingham.ac.uk/wp-content/uploads/2014/12/Blick...
I got a bit distracted by the copy of the Magna Carta the last time I was there so was a bit blinkered to everything else.
Next time I'm in town I'll pop in!
They're all running, although some are electrically wound, and they're all huge and with enough open space inside that you can see how they all work; some of them still ring.
Good views over the city, too.
I used to travel to Cambridge on a regular basis at the time the Chronophage was installed, and I remember one day making a point of going all the way downtown to see it... and it was just super tacky. It looked like a prop you might find in Disney World or something. Out of context, like if I saw that in the middle of London somewhere, it might have been OK. But this is Cambridge: the clock is on King's Parade, the street where all the historical colleges are, stunning historical buildings all around. You are straight across from King's College Chapel, the most iconic building in all of Cambridge. You are a few feet away from The Eagle, a pub that has been around longer than the US has existed as a Republic. And in the middle of all that, you have this gold and blue LED monstrosity. It just feels completely out of place.
So yeah, if you are ever in Cambridge, I'd be more likely to recommend trying the amazing ostrich hamburgers in the street market about a block away from the Chronophage. Those are also out of place, but SO good, heh.