Recently, the signs of a historical city dating back to the 1st millennium BC have been discovered in Maku County. It belongs to Urartian kingdom located in a place known as "Baam-e farhad" in the heights adjoining "Sangar" village 7 kilometers north of Maku County. Down this Urartian city, there is a rocky tomb which is called Dakhme Sangi (Rocky Tomb/Dakhma) of the area.
This Dakhma that has been carved in the heart of the mountain inside a large rock consists of some rooms and is attached to the mountain through a stone staircase. Stone walls of Farhad dakhma are amazingly smooth; carving such smooth walls in the middle of hard rocks of the mountain seems really difficult even in the present time. Inside the dakhma is pitch dark and there is no source of light.
This monument has been registered in Iran's National Heritage on March 21, 1968 with the registration number of 803.