The remains of the Stadium of Domitian (UNESCO World Heritage) are located beneath Piazza Navona, about 5 meters below ground. This archaeological area is what remains of the first and only masonry stadium known of in Roman history.
The Stadium of Domitian was commissioned by Emperor Titus around 80 AD (the same year the Coliseum was completed). Today, this Stadium, once home to Roman entertainment, lies underneath a modern city. It is certainly worth a visit to escape the hustle and bustle of the city.
You'll visit the site at your own pace and enter anytime during the opening hours of the site, without missing the stories behind the Stadium. The audio guide included in the ticket (for children too), the illustrated panels, the unpublished photos and videos (also in 3D) tell the stories of the Stadium, Piazza Navona, sports in ancient Rome, and some of the city's major monuments.