The Roman bath from the time of the emperor Caracalla (211-217), lies in the historical center of Ankara. It was built on a flat settlement hill, which today rises about 2.5 metres above the road.

The current entrance to the site is to the east. From there one first enters the square of the Palaestra, which occupied about 80 × 80 meters. The practice area was surrounded on all four sides by porticoes with 32 columns each. These were six metres high, had Corinthian capitals and bore an architrave with inscriptions. Statues were probably erected in the eastern entrance area, two rooms each in the north and south could have been libraries or reading rooms.
Today the Palaestra is used as an open-air museum in which numerous steles, inscriptions, capitals and other architectural fragments from the urban area of Ankara are displayed.
To the west is the actual bathing building with a floor area of 80 × 130 metres. In the entrance area there is a former covered exercise room, an apodyterium and a frigidarium with swimming pool. Behind it are the Tepidarium (warm water bath), also with a pool, as well as the Caldarium (hot water area) and various ancillary and technical rooms. Apart from the foundation walls, little of the rooms is preserved, but the round brick columns of the Hypocaust underfloor heating can be seen well everywhere.

In the north of the Palaestra 17 metres of the Säulenstraße with adjacent shops were excavated, which probably led to the Augustus temple. To the east of Palaestra, near the entrance, there is a Byzantine tomb. The underground tomb was found near Ankara Central Station in 1930 during the construction of an administrative building and moved here. The tomb has two intersecting barrel vaults and dates back to the 3rd/4th century, it has been restored by the Ankara Museum.