Meet your guide in Orosei or Dorgali before starting the adventure with some off-road driving to descend into the valley where the trek path begins. The hike starts with some water wading through the Flumineddu river to enter the woodland area formed of Old Oaks, Arbutus and Mediterranean shrubs. Walk along the cliffs of Monte Oddeu and arrive at the entrance to the Gorroppu gorge in less than 2 hours. Admire the incredible rocky walls which rise for more than 400 meters over the dry river bed, making this gorge one of the deepest canyons in Europe. Today the canyon is a natural border between the Italian territories of Urzulei and Orgosolo. The canyon was formed when the Flumineddu river excavated the Jurassic limestone that formed when Sardinia was covered by the sea. Learn from your guide how the marine rocks are full of fossils from ammonites, fish and algae found in the area, and hopefully catch a glimpse of such an artifact. During the trek, discover the unique micro climate of the canyon that allowed the giant growth of the trees including the Phyllirea and the Old Yew. As you continue on the hike, the path becomes harder and harder, you may have to use your hands to proceed through the boulders. When it is no longer possible to go further, it’s time to head back.