Vikos gorge is the deepest canyon in the world. The Vikos Gorge, with a length of 20 km, walls that range from 120–490 m deep, and a width ranging from 400 m to just a few meters at its narrowest part, is listed by the Guinness Book of records. The Vikos Gorge has been designated as a world geopark by UNESCO. Most of the route has no elevation differences except for the start (downhill) and the end of it (uphill). In the middle of the trail visitors may refill their canteens from a spring. At the end of the trail a tour of the nearby Voidomatis springs and the monastery of Panagia will be provided. Visitors also have the chance to swim in Voidomatis cold blue waters and drink water from the springs. Trekking time is about 6 – 8 hours. Difficulty level: moderate. Equipment needed: mountain sports shoes or hiking boots, waterproof jacket.