The ancient locality of Alasht, 18 km. from Zirab, is the birth place of Reza Khan, the founder of the Pahlavi dynasty.
The vicinity of Alasht is in a mountainous and forest region. Here the dwellings are mainly constructed of sun baked bricks, with roofs covered with wood. The birthplace of Pahlavi I, is in the Pahlavi Khalil vicinity and the structure is a double storeyed one. After under going repairs, the same was converted into a public library.