Parnassus is one of the largest mountainous regions of Mainland Greece and one of the highest Greek mountains. It spreads over three municipalities, namely of Boeotia, Phthiotis and Phocis, where its largest part lies. Its altitude is 2,457 meters and its highest peak is Liakouras. To the Northeast it is connected to Giona and to the south with Kirphe. Its name is due to the homonymous hero of the Greek mythology, son of Cleopompus (or Poseidon) and Cleodora, who had built on the mountain a city which was destroyed in the Deluge of Deukalion. Etymological analysis, however, shows a prehellenic origin of the name, relating it to the Pelasgians, and it appears to be from the Anatolian language Luwian.