The Arapsu Bridge is a Roman bridge on the western outskirts of Antalya, spanning the Doyran Stream where it cuts through the limestone plateau. It dates from the 2nd or 3rd century CE and its single arch is still structurally sound, making it one of the better-preserved Roman bridges in the region.
The bridge is not a major sight, but it is an interesting detour if you are cycling along the coastal road west of the city, and it gives a sense of how thoroughly the Romans engineered the landscape of Pamphylia. The stream below runs through a small canyon worth a short walk.