Bandar Gaz is situated in the south eastern fringes of the Gulf of Gorgan and is at a distance of 20 km. south of Bandar Turkaman and 48 km. from Gorgan. This port before the construction of Bandar Turkaman was the most important commercial port in west of Mazandarn, Semnan and Khorassan. Bandar Gaz became an industrial center due to its location in the commercial high way in north-west of Iran. The oil-extraction, rice-grinding and cotton purifying factories were established, in this town. This coastal town has interesting natural beauty and its wetlands, groves and wildlife are famous.
due to the presence of sweet water of the gushing rivers like Qarah Soo, the salinity of water is reduced and the water becomes muddier. Generally the water entrance capacity is less than its exit and its water shortage is supplemented by the Caspian Sea.
The Gulf of Gorgan is the largest Gulf in the Caspian Sea. It has been created due to the expansion of Mian Kaleh peninsula in southeast of the Caspian Sea. The Gulf of Gorgan covers an area of about 400 km. and its length is about 70 km. in an east-west direction. Its maximum depth is 4 meters and this depth increases from west to east till the southern side of Ashoura Deh peninsula. In the western part its salinity is more than salinity of the Caspian Sea because of its reducing depth and increase of evaporation.
This hillock is accounted as the most valuable in respect to archaeological fields, in Golestan province. The same is located 25 km. north east of Gorgan, covering a vast area and overlooking a large blue pool. The same dates back to the 3rd millennium BC. In the archaeological and scientific finds within its layers, evidences such as earthenware, vessel articles for daily use, and bronze implements have further increased the merits of this region. The said is on historical record in Iran.