Hidirlik Tower is one of the oldest surviving monuments in the city. It was built by the Roman Emperor Hadrian in the 1st or 2nd century and is thought to be a monumental tomb, which is 14 meters high.The tower was included in the city's defence system during the Byzantine Period was combined with the walls. It served as a pavilion during the Seljuk Period and as a military warehouse during the Ottoman Period. Throughout history, the tower has also been used as a watchtower for ships passing through the Gulf of Antalya.