An attractive route along the banks of the Estena River, a beautifully preserved riverbed. Besides the stunning scenery, you can admire typical Mediterranean vegetation (holm oaks, cork oaks, gall oaks, rock roses, etc.), riparian vegetation (ash, willows, etc.), northern trees such as yew and birch, remarkable geological formations created by erosion, and traces of the periods when this area was covered by the sea more than 400 million years ago, such as those of a giant sea worm. It is considered a Site of Geological Interest (geosite).