In the northern part of the bay; Special petrochemical zones and refinery facilities are located. But the eastern part of the bay, near the village of Haleh, remains untouched to visit and enjoy nature.
One of these islands is known as Tahmadon, which is a relatively large island with a length of about 12 km. The island is uninhabited and no one enters it except a few fishermen and nature lovers.
In the southwest of Semnan province and between the provinces of Tehran, Qom and Isfahan, there is a large area with rich flora and fauna that remains pristine and untouched.