Theoktista (greek=Θεόκτιστα, God-made landscape) are layers of limestone forming impressive tower-like structures due to the vertical erosion of the stream. The gaps between the layers are remnants of old karstic ducts. Stone-built bridges (Missios, Kokkoris, Kontodimos and Plakidas) are located around this area.
Near the river bed characteristic structures, such as chert lenses, breccias and synsedimentary folds can be distinguished. Also some of the most famous traditional stone-built villages (Kipi, Koukouli, Vitsa) complete the scenery.