This is an interesting site. The old bridge from the Roman era is in remarkably good condition. It's not the kind of place that you would detour out of your way to see, but if you're in Vaison-la-Romaine, you can fit this into a full day's walking tour of the town. In fact, if you plan visit the medieval city, you'll probably have to cross it to get there. It's a good place for a photo op.