Parnassos mountain rises on the east of Fokida. Its high summits Liakra (2457m), Gerontotavros, Tsakros etc. belong to the departments of Fthiotida and Voetia. Hoewer, the western complex of the mountain and a considerable part of the National Park belong to Fokida.

Parnassos meets Ghion mountain at the neck of Amphiali, known as 51, over the crossing to Lamia. Ghiona’s solid bulk is situated in the heart of Fokida. Between the two mountains a deep, fertile valley spreads, ending up, on the south, at the Coronthian bay. It is the valley of Amfissa, covered with olive groves and known in antiquity as Krisseo Pedio (the land of Krissa). The main part of the valley spreads between Itea, Chrisso and Amfissa. However, some of its brunches, lead, along Plistos river, towards Delphi and Arachova while others to the villages Elaeonas, Droshochori and Viniani. A unique Greek landscape is thus created, directly connected to the historical environment and the archaeological site of Delphi.

The not easily-accessed solid bulk of Ghiona mountain spreads over a wide extent. Many slopes and small plateaus describe the mountain. Two big ravines, Rekka and Lazorema contribute to its impressive natural beauty. Rekka deeply cuts the eastern body of Giona in length of 12 km. Lazorema sinks steeply at the western part of the mountain, below its highest summits, over a front of gigantic cardinal cliffs and rocks.

On the west, the complex Giona is bounded by the narrow valley of Mornos river (ancient Dafnos) which separates it from Vardusisa mountain. The southern part of Ghiona consists of waterless, uncultivated land with sparse vegetation, as well as rocky mountains of a medium altitude ending up at the shores of Galaxidi and Eratini.