The Kheir Abad complex is one of the most important historical sites in Gachsaran. This complex consists of a school, fire temple, castles, and water reservoirs.

The construction of these types of castles are related to the sun worshipping and angel fertility beliefs.

This relic is located on the right side of the Dehdasht - Behbahan Road, and to the left of the Kheir Abad River and is related to the Sassanide era.

The province of Kohkiluyeh Va Boyer Ahmad with an area of 15,504 square kilometers is located in central southwestern Iran.

This ancient city is located at a distance of 60 km. from Zabol and 6 km.