The Roman city has been identified with ruins at Hammam Righa in the wilaya of Chlef, Algeria, North Africa.
[1] The ruins are located at latitude 36.379474N, longitude 2.395618E near the railway town of Boumedfaâ,[2] and is on the Oued Djer River.
Augustus even founded -in what is now coastal Algeria- the following Roman colonies: Igilgili, Saldae, Tubusuctu, Rusazu, Rusguniae, Zuccabar, Thuburnica and Gunugu.
The importance of Aquae Calidae – as the name indicated – was from the warm waters (reaching nearly 50 C.) that were used for the local famous Roman thermae.
During the centuries of Roman domination Aquae Calidae was a small but rich city with a Forum, theater, baths, library and aqueducts, but nearly all has disappeared.