Lucca is about a half hour from Pisa (OK not everything is an hour away). They have converted the old wall around the city into a park. It’s a thick wall. You can walk, bike or jog around the old center of the city. We walked it. It’s 2.5 miles all the way around. There’s been a wall around Lucca for 2000 years. They also have a piazza that is shaped like an old Roman amphitheater. The amphitheater was cannibalized after the fall of Rome and all that remains is the shape.
The image is vertical for some reason. I took it as a panorama with my phone. I’ll fix it when I get home. In the mean time, turn your head.