This cache is located on what remains of the Town Walls, just next to a remaining watch tower, now used as holiday accomodation.
Dotted around town and at GZ, there are Lion Mascaron drinking fountains, I was thinking they were Victorian dog fountains, with the Shropshire Leopard on them.
You can read more about the history of these water fountains here
You are looking for a nano, please replace as found.