Cannae is where Hannibal beat the Romans in the second century BC. It was burned into the Roman psyche and was the motivator of salting Carthage. The site is approximately an hour's drive outside Bari, where we caught the ferry back to Albania. So - we stopped to see it.
Getting through to it is a bit of a maze due to all the orchards and vineyards in the area, but it's worth it.