Semnān

Semnān, ostān (province), northern Iran, bounded by the ostāns of Raẕavī Khorāsān and South Khorāsān on the east, Eṣfahān on the south, Qom and Tehrān on the west, and Māzandarān and North Khorāsān on the north. The northern half of the region is an extension of the Elburz Mountains pierced by narrow defiles; to the south the land surface drops gradually by shallow terraces to the flat salt waste of the Kavīr-e Namak. The Rūdkhāneh-ye...