Kithaironas is the mountain where Oedipus met his real father, the king of Thebae and during a dispute, he killed him, without being aware of that man being his father. Later he went to Thebae and married the wife of the late king, that means his own mother. They had four children together. Years later the whole truth came up, thus Iokasti, the mother and wife, killed herself and Oedipus, the son and husband, pulled his eyes out and he got blind.
Their two sons were fighting each other years later and finally they killed one another.
Their daughter Antigone was burried alive in her tube and the only one who lived was Electra, the other daughter.
It' a mythe from the greek mythology. Sophokles, the dramatist, has written a trilogy with the adventures of Oedipus.

Thank you for the mythology lesson Mary! I had no idea where I was really :-) Looks like Oedipus chose a nice place for a mean task.

Once more, the Arca Swiss showed its class.