The Vikos Canyon (greek=φαράγγι Βίκου) is 10 km long and has vertical, steep and rocky slopes that are hundreds of meters high. The combination of the tectonic- karstic phenomena created favourable conditions for intense erosion forming the deepest Canyon of the World (Guinness Book of Records, 2005). The extensive hydrological basin of the Voidomatis river reveals a high karstic field. During the Pleistocene and the alternating glacial and interglacial periods huge volumes of water was released. The geodynamic processes of the past had created fast ascendant movements and the discontinuities caused by the faults had deeply carved by the flowing water. Vikos Canyon revealed the stratigraphic column of the limestone blocks that were created millions of years ago in Tethys Sea. When one visits Vikos Canyon can see on a natural scale this succession of limestone which now- after all these complex geological processes- can be found at altitudes reaching 2,400 metres!