Olympos is the second important port city after Phaselis on the southern coast of Antalya. The city takes its name from Tahtalı Mountain with a height of 2 thousand 375 meters, one of the western extensions of the Taurus Mountains, 16 kilometers north. It is within the borders of Beydağları-Olympos National Park. Although the exact date of establishment is not known, Olympos, which is mentioned in the Lycian Union coins minted between 167 and 168 BC, is one of the six cities with three voting rights in the Lycian Union. He represented the east of Lycia in the Union. Most of the surviving ruins of the city are covered with trees and bushes in the forest and belong to the Hellenistic, Roman and Byzantine periods. The surviving remains of Olympos are generally located from east to west, at the mouth of a river flowing rapidly into the sea and on both sides. The riverbed, which divided the city into two in the ancient period, was enclosed in a canal, and both sides were used as piers and connected by a bridge. Today one pillar of the bridge remains in place. On the south shore, the polygonal masonry wall of the Hellenistic Period and the part indicating the Roman and Byzantine repairs next to it can be seen. In the small and steep acropolis close to the mouth of the river, there are building remains from the late periods. The Hellenistic-based and Roman-repaired small theater on the south bank of the river is quite ruined, and one side of the entrance is well preserved.