This is such a well known expression. While “all roads lead to Rome” is an idiom, I don’t think it gets used that way as much these days. People seem to take it literally. Everyone wants to visit Rome. As an idiom, it actually means the opposite, that there are many ways to approach the same subject. No one seems to know if the Romans ever said this. The earliest example of its use in English is from Chaucer. If you want to geek out about this, read this article.
On a beautiful sunny day, it is hard to imagine the atrocities carried out along this road 2,000 years ago. The Romans crucifed people, famously Christians, along this road. But, this road was also used as a graveyard and many of the most famous sites today are the remains of mausoleums. This road was built more than 2,300 years ago. In 71 BCE, the famous Sparticus fought along here. Over 6,000 slaves were crucified as a result of that slave revolt. At that time in the Roman Empire, one in three people were slaves.
The Appian Way goes all the way to Brindisi in Apulia. I would like to see it down there too. But, closer to Rome, one Sunday, I decided to go walk on the most well preserved part of Roman road, near Rome. Today, this road is a park and tourist attraction. There seems no trace of the sorrow of the past. And the only armies one sees are joggers, walkers, and bikers.
One can get to the archeological park and join a bike or walking tour, or just choose a spot and go there. I took a 20 minute car ride out to a spot where a modern road intersects with the Appian Way. It seemed so far out. Cars are allowed on the Appian way but there are parts where most drivers choose the highway. The taxi service had no problem finding me when I wanted to return. One can walk from the center of Rome and walk out but the road is busy for the first five or six miles (8-10 kilometers). One can take the bus or metro as well. My taxi ride cost 29 euro each way. It was so far removed from central Rome that I saw bales of hay and chatted with farm hands.