The 4th century Tombs of King carved into the rocks stand on the high steep cliffs overlooking Dalyan in Koycegiz. Dalyan Caunos King Rock Tomb consist of two clusters which are close to each other. It is possible to go on foot to the rock-cut tombs on the front left. Ropes or ladders to go right to the rock tombs are required. One of these tombs is decorated with the motifs of two lions that face each other. The completion of the right most rock tomb was left unfinished. The rock tombs overlook Dalyan canal which are carved into the facade of the temple in ancient times have had some robberies. The remaining findings are their dynasty tomb indicates they are from the 4th century BC. Caunos was an important city and was situated between Caria and the rest of the Lycian regions. It is estimated that Caunos was founded in the year 3000 BC. Milletos is the son of the founder of the city of Caunos. Caunos had various rumours about his sister Byblis. She falls in love with her brother Caunos, but he refuses her love. Therefore she commits suicide by hanging herself. Therefore an idom come out as 'Love of Caunos'.

According to second rumour is that Caunos is dismissed because of indiscreet affair. So Caunos comes the area which is called by his name. Herodot separated Caunos from Carians and Lycians in terms of its traditions and customs and he mentioned that the Caunos language resembles the Lycian's one from time to time. According to George E. Bean, although both languages are similar to each other, they have own their specific linguistic features. 

You need reach the castle at the top of a steep mountain to see the centre of the Caunos settlement. You can see the theatre, castle, church, bath, temple, pool, rock tombs, city walls, old harbour, Dalyan and Iztuzu beach. You can go up to the castle from the theatre. Many various excavations had been carried out by foreign archaeologists between 1877-1952. The excavations of Caunos which have been conducted by Professor Dr. Baki Ogun since 1967 are continued by Professor Dr. Cengiz Isik, today.