Giona is the highest mountain of Central Greece, with Pyramida being the highest peak (2507 m.) and Platyvouna being the second highest (2316 m.).  The mountain is full of firs and cedars and has been called the rarest mountain natural ecosystem of Central Greece.

There are some rare species of animals on Gkiona: A very small population of chamois (rupicapra, rupicapra balcanica, also known as Chamonix of the Alps) and several raptor species, such as two species of crows (pyrocorax pyrocorax and pyrocorax graculus).

Giona is ideal for climbing and has the largest slope in the Balkans right above Sykea village. Near the same village, you can also see the beautiful cave of Zoodochos Pigi (Arsali).