This city which is buried under a huge pile of shifting sands was first discovered in 1960 and excavated between 1962 and 1965. Dahan-e Gholaman consists of large public buildings, temple, residential areas, streets, streams, and military and industrial areas. The city is the only ancient place related to Achaemenid era that indicates Iran's Sovereignty on eastern areas well. Dahan-e Gholaman City is important for different reasons. For one thing, it is the only mud city from Achaemenid period in which we can clearly see ordinary people's life and their houses beside large public or state buildings and monuments. In addition, this Achaemenid city has not advanced without planning, but it has been constructed by careful planning and engineering.
Based on archeologists, one of the main factors of the abandonment of the city is that Hirmand River bed abruptly dried up.