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.
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 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.