The remains of the ancient town can be visited
Porta Esquilina

Now known as the Arch of Gallienus, the Porta Esquilina was a city gate of ancient Rome and marked an access point to the city.
History+
The Porta Esquilina was part of the Servian Wall and was situated on the Esquiline Hill, one of Rome's seven hills. It was located at the southern end of the Agger, the most heavily fortified section of the wall. Within the city, the Clivus Suburanus, a main street of the Subura district, led directly to the gate. Outside the wall, roads such as the Via Labicana, the Via Praenestina, and likely also the Via Tiburtina began here. In Republican times, sand pits and burial grounds were located in front of the gate. Towards the end of the 1st century BC, Maecenas had the Horti Maecenates laid out here, which later became imperial property.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://en.wikipedia.org/wiki/File:Arco_di_Gallieno.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: 41.8958, 12.5013