According to scientists, Tlos was an ancient city of Lycia. It is located at a distance of 45 km from Fethiye. According to the results of archaeological excavations it is anticipated that the Foundation of the city dates back to 2000 B. C. the town was First Tlos mentioned in Hittite chronicle of the 14th century BC After the breakup of the Hittite Empire, Tlos has become one of the largest settlements of Lycia, and afterwards became part of the Roman Empire.

Tlos is located in the East valley Xanthos. In its time it was one of the six principal cities of Lycia. Then Tlos was called "the most brilliant metropolis of the Lycian Union, the city also was the sports centre of the Federation. Until the 19th century Tlos was inhabited by the Turks. The main attraction of the city is the Acropolis. During its existence under the influence of different cultures in the city formed an interesting variety of structures.

On the Acropolis is the cemetery of Close, decorated with the most beautiful tombs of Lycia. Great tomb of Bellerophon with three carved doors is the most prominent tomb. It is a tomb, reminiscent of the temple. One of the doors of the tomb are decorated with relief image of the legendary Greek hero riding Pegasus. On another door with a lion guarding the entrance to the tomb. The legend says that the hero was punished Lycian king Iobates. And as punishment he had to fly on Pegasus, presented to Athena at the top of the mountain and slay the fire-breathing monster Chimera. Bellerophon killed the monster and took to wife the daughter of a king. After that his descendants ruled Lycia.

On top of the Acropolis of the city of Tlos castle "Murderous Ali". The castle was built on the Foundation of the Lycian fortress. It offers delightful views of fields, orchards and mountains.

The Byzantine Basilica was built on the ruins of the Roman gymnasium and town baths. Inside the Church are Seven Gates that open into the valley. Preserved in Close and amphitheatre, this monumental building, which is decorated with intricate stone carvings. Also preserved ruins of the stadium and theatre built in the 2nd century B. C. the Scene is almost completely destroyed, but survived 34 rows for the audience.