Cloud forest (Abr forest) is one of the natural attractions and one of the most extraordinary sights of Shahroud and it is a place where the sky seems to have approached the earth.
The position of the Opert Wall is such that it prevents clouds from passing from the north to the south, so the view of the cloud ocean can be seen in this area most days of the year.
From Sangchal village, one of the famous forest trekking routes starts among nature lovers, which finally leads to one of the villages near Amol called Diva.