Samen Underground City near Malayer (Hamedan Province)
Samen underground city (located 400 km west of Tehran) lies in southwestern Malayer is believed to be built sometime between the fall of the Achaemenid Empire (550-330 BC) and the early Parthian era (247 BC-224 CE). It is one of the most ancient cities of Hamedan.
Copyright: Abdollah Heidari - IRNA