The remains of the ancient town can be visited
Porta Tiburtina
The Porta Tiburtina, also known today as Porta San Lorenzo, was once part of Rome's Aurelian Walls. It marked the passage of the Via Tiburtina, a road connecting to Tibur, modern-day Tivoli. Its particular significance lies in the integration of an older aqueduct arch into the fortification system.
History+
Originally, the Porta Tiburtina was a travertine arch constructed in 5 BC under Emperor Augustus. This arch served to carry the three aqueducts, Aqua Iulia, Aqua Marcia, and Aqua Tepula, over the Via Tiburtina.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Porta_Tiburtina_front.JPG
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 41.8975, 12.5103