This famous observatory was constructed in the year 657 AH. during the rule of Hollakoo Khan under the orders of the great Iranian scholar Khajeh Nasiroddin Toosi.

The former Shah Goli or the present Eil Goli (the Shah's pool) is one of the recreational areas of Tabriz and Iran located to the north east of Tabriz.

This castle is on the fringes of the Aras River, in the village of Kordasht and is related to the Qajar era.

Located on a height, 26 km. west of Varzegan, this castle belongs to pre-Islamic period and was also utilized after Islam.

The castle is located south of Pol-e-Dokhtar of Mianeh and the caravansary or ancient inn of Jamal Abad, one of the masterpieces of architecture.