The Vikos Gorge is part of the 12,600 hectare Vikos-Aoos National Park and has been listed in the Guinness book of records as the deepest canyon worldwide in proportion to its width. It is definitely a spectacular sight! It is accessible from several points, including the gravity-defying cliff-face monastery of Agia Paraskevi at its southern end and the ridge-top village of Vikos at the other. The landscape of the 20 km long gorge is extremely diverse and is characterized by abrupt changes in altitude. The Vikos Gorge has been carved over millions of years by the Voidomatis River, a tributary of the Aoös River. As it splits the mountain in half, its slopes expose rock formations of limestone and dolomite, dating back to 150 million years . Its vertical cliffs rise up to a height of 1700 meters.