Uzundara- Hellinistic fortress of Greco-Bactrian period. For the first time this unique archaeological monuments was discovered by Prof.E.V.Rtveladze in 1991 in Boysun mountains . A powerful fortification system in such a waterless area of Suvsiztagh Mount. 10 years research works, excavations carried out by Uzbek-Russian expedition under the leadership of Dr. Dvurechenskaya gave a lot of new cultural materials of incredibly new contents. Archaeological findings witness the construction of Uzundara fortress during the formation of Seleucid state (IV-III cc.B.C.) and existed approximately 150 years.