In the forest between Kojur and Sisangan, like other Hyrcanian forests along the south of Caspian Sea, various species of trees can be seen. In fact, by walking a few hundred meters may change the type and species of trees. This feature is unique to the Hyrcanian forests, and this diversity of forest cover is rarely seen elsewhere.
In the middle of the forest path between Kojur and Sisangan, you will reach a gorge with mossy waterfalls. The name of this area is Shiva Darreh. The beauty of the gorge along with waterfalls that fall down from the mossy stones of the gorge wall has caused it to be named the corridor of paradise.