The aqueduct of Olba is a construction of a 20 km long water pipe into the city. Inscriptions on the aqueduct indicate that the aqueduct was built during the reign of Emperor Septimius Severus (193 - 211 AD) and restored under Emperor Justuin II in 566. The two-storey aqueduct is 150 m long and 25 m high.

According to the Greek historian and geographer Strabon (63 B.C. to 23 A.D.), the foundation of the city was attributed to Aias, a half-brother of Teukros, King of Cyprus. Aias founded a priesthood in Olba and preached the cult of Zeus Olbios. It is known from inscriptions that the city was ruled at the end of the 3rd century / beginning of the 2nd century by the dynasty of the Teukridai, all priest kings.

Their empire extended from Claudiopolis (Mut) to Kanytelleis (Kanlıdivane). Even when the nearby Diokaisareia became town under Marcus Antonius, Oba remained seat of the kings. 39 A.D. the dynasty of priests ended, 72 A.D. it was incorporated into the Roman province Cilicia (Cilicia). In Byzantine times Olba was assigned to the province of Isauria, later to Pamphilia.

The Hellenistic city was situated on the hill and was surrounded by a city wall which is still partly preserved today. The Acropolis was built on an 1112 m high hill with a triangular base. The slopes and the top of the hill are covered with ancient remains of buildings and cisterns. At the old intersection of the roads to Diokaisareia, Korykos and Seleukeia the remains of the theatre and the Nymphaeum can be seen today.