Choqazanbil is situated at a distance of 45 km. south east of Shoosh, and is the only remnant of an ancient city, that was constructed approximately in 1300 BC. This city which was at the vicinity of 2 km. from Dez river, was known as "Ontashgal".
The same is a reminder of the new Elamite civilization. It was surrounded by three interconnected sun brick made ramparts with the main entrance situated in the eastern side of the largest rampart.

The palaces and tombs of the Elamite monarchs are situated between the first and second ramparts. Between the second and the third ramparts, the remnants of the water supply and purification system for city is observed.
The water purification system of Choqazanbil was to provide drinking water for citizens which is obviously accounted as one of the most ancient water supply systems. In the center of the third rampart, the main temple (Ziggurat) is placed. This square shaped structure is constructed at the dimensions of 105x105 sq.m., along four main directions